diff --git a/package.json b/package.json
index f3f391254..237f28c1a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "private": true,
-  "version": "4.7.3-beta.1",
+  "version": "4.7.3-beta.4",
   "name": "dbgate-all",
   "workspaces": [
     "packages/*",
@@ -11,7 +11,7 @@
     "start:api": "yarn workspace dbgate-api start",
     "start:app": "cd app && yarn start",
     "start:api:portal": "yarn workspace dbgate-api start:portal",
-    "start:api:covid": "yarn workspace dbgate-api start:covid",
+    "start:api:singledb": "yarn workspace dbgate-api start:singledb",
     "start:web": "yarn workspace dbgate-web dev",
     "start:sqltree": "yarn workspace dbgate-sqltree start",
     "start:tools": "yarn workspace dbgate-tools start",
diff --git a/packages/api/.env-portal b/packages/api/env/portal/.env
similarity index 100%
rename from packages/api/.env-portal
rename to packages/api/env/portal/.env
diff --git a/packages/api/.env-singledb b/packages/api/env/singledb/.env
similarity index 100%
rename from packages/api/.env-singledb
rename to packages/api/env/singledb/.env
diff --git a/packages/api/package.json b/packages/api/package.json
index 721a664d3..6c8238eed 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -53,8 +53,8 @@
   },
   "scripts": {
     "start": "env-cmd node src/index.js",
-    "start:portal": "env-cmd -f .env-portal node src/index.js",
-    "start:singledb": "env-cmd -f .env-singledb node src/index.js",
+    "start:portal": "env-cmd -f env/portal/.env node src/index.js",
+    "start:singledb": "env-cmd -f env/singledb/.env node src/index.js",
     "start:filedb": "env-cmd node src/index.js /home/jena/test/chinook/Chinook.db",
     "start:singleconn": "env-cmd node src/index.js --server localhost --user root --port 3307 --engine mysql@dbgate-plugin-mysql --password test",
     "ts": "tsc",
diff --git a/packages/api/src/controllers/apps.js b/packages/api/src/controllers/apps.js
index 94b9f050b..ba2afe587 100644
--- a/packages/api/src/controllers/apps.js
+++ b/packages/api/src/controllers/apps.js
@@ -265,4 +265,16 @@ module.exports = {
 
     return true;
   },
+
+  createConfigFile_meta: true,
+  async createConfigFile({ appFolder, fileName, content }) {
+    const file = path.join(appdir(), appFolder, fileName);
+    if (!(await fs.exists(file))) {
+      await fs.writeFile(file, JSON.stringify(content, undefined, 2));
+      socket.emitChanged(`app-files-changed-${appFolder}`);
+      socket.emitChanged('used-apps-changed');
+      return true;
+    }
+    return false;
+  },
 };
diff --git a/packages/api/src/controllers/files.js b/packages/api/src/controllers/files.js
index 6d82c2e29..350f72262 100644
--- a/packages/api/src/controllers/files.js
+++ b/packages/api/src/controllers/files.js
@@ -98,6 +98,7 @@ module.exports = {
       const app = folder.substring('app:'.length);
       await fs.writeFile(path.join(appdir(), app, file), serialize(format, data));
       socket.emitChanged(`app-files-changed-${app}`);
+      socket.emitChanged('used-apps-changed');
       apps.emitChangedDbApp(folder);
       return true;
     } else {
diff --git a/packages/api/src/controllers/plugins.js b/packages/api/src/controllers/plugins.js
index e9d62b20d..4a537decf 100644
--- a/packages/api/src/controllers/plugins.js
+++ b/packages/api/src/controllers/plugins.js
@@ -89,6 +89,12 @@ module.exports = {
               encoding: 'utf-8',
             })
             .then(x => JSON.parse(x));
+          if (!manifest.keywords) {
+            continue;
+          }
+          if (!manifest.keywords.includes('dbgateplugin')) {
+            continue;
+          }
           const readmeFile = path.join(isPackaged ? packagedPluginsDir() : pluginsdir(), packageName, 'README.md');
           // @ts-ignore
           if (await fs.exists(readmeFile)) {
diff --git a/packages/api/src/main.js b/packages/api/src/main.js
index b3268cc7b..275d6c672 100644
--- a/packages/api/src/main.js
+++ b/packages/api/src/main.js
@@ -95,7 +95,12 @@ function start() {
 
   if (platformInfo.isNpmDist) {
     app.use(getExpressPath('/'), express.static(path.join(__dirname, '../../dbgate-web/public')));
-    getPort({ port: 5000 }).then(port => {
+    getPort({
+      port: parseInt(
+        // @ts-ignore
+        process.env.PORT || 3000
+      ),
+    }).then(port => {
       server.listen(port, () => {
         console.log(`DbGate API listening on port ${port}`);
       });
diff --git a/packages/api/src/shell/copyStream.js b/packages/api/src/shell/copyStream.js
index 60e49deb7..637eb0bb9 100644
--- a/packages/api/src/shell/copyStream.js
+++ b/packages/api/src/shell/copyStream.js
@@ -1,18 +1,47 @@
 const EnsureStreamHeaderStream = require('../utility/EnsureStreamHeaderStream');
+const Stream = require('stream');
+const ColumnMapTransformStream = require('../utility/ColumnMapTransformStream');
+
+function copyStream(input, output, options) {
+  const { columns } = options || {};
+
+  const transforms = [];
+  if (columns) {
+    transforms.push(new ColumnMapTransformStream(columns));
+  }
+  if (output.requireFixedStructure) {
+    transforms.push(new EnsureStreamHeaderStream());
+  }
+
+  // return new Promise((resolve, reject) => {
+  //   Stream.pipeline(input, ...transforms, output, err => {
+  //     if (err) {
+  //       reject(err);
+  //     } else {
+  //       resolve();
+  //     }
+  //   });
+  // });
 
-function copyStream(input, output) {
   return new Promise((resolve, reject) => {
     const finisher = output['finisher'] || output;
     finisher.on('finish', resolve);
     finisher.on('error', reject);
 
-    if (output.requireFixedStructure) {
-      const ensureHeader = new EnsureStreamHeaderStream();
-      input.pipe(ensureHeader);
-      ensureHeader.pipe(output);
-    } else {
-      input.pipe(output);
+    let lastStream = input;
+    for (const tran of transforms) {
+      lastStream.pipe(tran);
+      lastStream = tran;
     }
+    lastStream.pipe(output);
+
+    //  if (output.requireFixedStructure) {
+    //   const ensureHeader = new EnsureStreamHeaderStream();
+    //   input.pipe(ensureHeader);
+    //   ensureHeader.pipe(output);
+    // } else {
+    //   input.pipe(output);
+    // }
   });
 }
 
diff --git a/packages/api/src/utility/ColumnMapTransformStream.js b/packages/api/src/utility/ColumnMapTransformStream.js
new file mode 100644
index 000000000..1bbd913df
--- /dev/null
+++ b/packages/api/src/utility/ColumnMapTransformStream.js
@@ -0,0 +1,21 @@
+const stream = require('stream');
+const { transformRowUsingColumnMap } = require('dbgate-tools');
+
+class ColumnMapTransformStream extends stream.Transform {
+  constructor(columns) {
+    super({ objectMode: true });
+    this.columns = columns;
+  }
+  _transform(chunk, encoding, done) {
+    if (chunk.__isStreamHeader) {
+      // skip stream header
+      done();
+      return;
+    }
+
+    this.push(transformRowUsingColumnMap(chunk, this.columns));
+    done();
+  }
+}
+
+module.exports = ColumnMapTransformStream;
diff --git a/packages/api/src/utility/freeTableStorage.js b/packages/api/src/utility/freeTableStorage.js
index caf5d2d8e..ceba774ef 100644
--- a/packages/api/src/utility/freeTableStorage.js
+++ b/packages/api/src/utility/freeTableStorage.js
@@ -3,7 +3,7 @@ const fs = require('fs-extra');
 async function saveFreeTableData(file, data) {
   const { structure, rows } = data;
   const fileStream = fs.createWriteStream(file);
-  await fileStream.write(JSON.stringify(structure) + '\n');
+  await fileStream.write(JSON.stringify({ __isStreamHeader: true, ...structure }) + '\n');
   for (const row of rows) {
     await fileStream.write(JSON.stringify(row) + '\n');
   }
diff --git a/packages/datalib/src/GridDisplay.ts b/packages/datalib/src/GridDisplay.ts
index 7e58fad1b..6fce029af 100644
--- a/packages/datalib/src/GridDisplay.ts
+++ b/packages/datalib/src/GridDisplay.ts
@@ -166,11 +166,12 @@ export abstract class GridDisplay {
   hideAllColumns() {
     this.setConfig(cfg => ({
       ...cfg,
-      hiddenColumns: this.columns.map(x => x.uniqueName),
+      hiddenColumns: this.columns.filter(x => x.uniquePath.length == 1).map(x => x.uniqueName),
     }));
   }
 
   get hiddenColumnIndexes() {
+    // console.log('GridDisplay.hiddenColumn', this.config.hiddenColumns);
     return (this.config.hiddenColumns || []).map(x => _.findIndex(this.allColumns, y => y.uniqueName == x));
   }
 
@@ -569,6 +570,20 @@ export abstract class GridDisplay {
     return sql;
   }
 
+  getExportColumnMap() {
+    const changesDefined = this.config.hiddenColumns?.length > 0 || this.config.addedColumns?.length > 0;
+    if (this.isDynamicStructure && !changesDefined) {
+      return null;
+    }
+    return this.getColumns(null)
+      .filter(col => col.isChecked)
+      .map(col => ({
+        dst: col.headerText,
+        src: col.uniqueName,
+        ignore: !changesDefined,
+      }));
+  }
+
   resizeColumn(uniqueName: string, computedSize: number, diff: number) {
     this.setConfig(cfg => {
       const columnWidths = {
diff --git a/packages/dbgate/README.md b/packages/dbgate/README.md
index c48ade878..dab3776b0 100644
--- a/packages/dbgate/README.md
+++ b/packages/dbgate/README.md
@@ -11,7 +11,7 @@ npm install -g dbgate
 
 After installing, you can run dbgate with command:
 ```sh
-dbgate
+dbgate-serve
 ```
 
 Then open http://localhost:5000 in your browser
diff --git a/packages/dbgate/bin/dbgate.js b/packages/dbgate/bin/dbgate-serve.js
similarity index 91%
rename from packages/dbgate/bin/dbgate.js
rename to packages/dbgate/bin/dbgate-serve.js
index 4130a04cc..4231b81be 100755
--- a/packages/dbgate/bin/dbgate.js
+++ b/packages/dbgate/bin/dbgate-serve.js
@@ -1,6 +1,7 @@
 #!/usr/bin/env node
 
 const path = require('path');
+require('dotenv').config();
 
 global.dbgateApiModulePath = path.dirname(path.dirname(require.resolve('dbgate-api')));
 global.dbgateApiPackagedPluginsPath = path.dirname(global.dbgateApiModulePath);
diff --git a/packages/dbgate/package.json b/packages/dbgate/package.json
index 3809631b4..b1afa4d6a 100644
--- a/packages/dbgate/package.json
+++ b/packages/dbgate/package.json
@@ -10,7 +10,7 @@
   "author": "Jan Prochazka",
   "license": "MIT",
   "bin": {
-    "dbgate": "./bin/dbgate.js"
+    "dbgate-serve": "./bin/dbgate-serve.js"
   },
   "keywords": [
     "sql",
@@ -19,12 +19,14 @@
   ],
   "dependencies": {
     "dbgate-api": "^4.1.1",
-    "dbgate-web": "^4.1.1",
     "dbgate-plugin-csv": "^4.1.1",
     "dbgate-plugin-excel": "^4.1.1",
     "dbgate-plugin-mongo": "^4.1.1",
-    "dbgate-plugin-mysql": "^4.1.1",
     "dbgate-plugin-mssql": "^4.1.1",
-    "dbgate-plugin-postgres": "^4.1.1"
+    "dbgate-plugin-mysql": "^4.1.1",
+    "dbgate-plugin-postgres": "^4.1.1",
+    "dbgate-plugin-xml": "^4.1.1",
+    "dbgate-web": "^4.1.1",
+    "dotenv": "^16.0.0"
   }
-}
\ No newline at end of file
+}
diff --git a/packages/tools/src/tableTransforms.ts b/packages/tools/src/tableTransforms.ts
index 403426cff..54f46ed03 100644
--- a/packages/tools/src/tableTransforms.ts
+++ b/packages/tools/src/tableTransforms.ts
@@ -1,5 +1,7 @@
 import { TableInfo } from 'dbgate-types';
 import _cloneDeep from 'lodash/cloneDeep';
+import _fromPairs from 'lodash/fromPairs';
+import _get from 'lodash/get';
 
 export function prepareTableForImport(table: TableInfo): TableInfo {
   const res = _cloneDeep(table);
@@ -10,3 +12,12 @@ export function prepareTableForImport(table: TableInfo): TableInfo {
   if (res.primaryKey) res.primaryKey.constraintName = null;
   return res;
 }
+
+interface TransformColumnDefinition {
+  src: string;
+  dst: string;
+}
+
+export function transformRowUsingColumnMap(row, columns: TransformColumnDefinition[]) {
+  return _fromPairs(columns.map(col => [col.dst, _get(row, col.src)]));
+}
diff --git a/packages/web/src/datagrid/CollectionDataGridCore.svelte b/packages/web/src/datagrid/CollectionDataGridCore.svelte
index a3f798ba2..9872660c9 100644
--- a/packages/web/src/datagrid/CollectionDataGridCore.svelte
+++ b/packages/web/src/datagrid/CollectionDataGridCore.svelte
@@ -174,6 +174,7 @@
     initialValues.sourceDatabaseName = database;
     initialValues.sourceSql = getExportQuery();
     initialValues.sourceList = [pureName];
+    initialValues[`columns_${pureName}`] = display.getExportColumnMap();
     showModal(ImportExportModal, { initialValues });
   }
 
@@ -208,7 +209,8 @@
           sql: getExportQuery(),
         },
       },
-      fmt
+      fmt,
+      display.getExportColumnMap()
     );
   };
 
diff --git a/packages/web/src/datagrid/ColumnManager.svelte b/packages/web/src/datagrid/ColumnManager.svelte
index 397b4a89b..024374ae3 100644
--- a/packages/web/src/datagrid/ColumnManager.svelte
+++ b/packages/web/src/datagrid/ColumnManager.svelte
@@ -175,10 +175,12 @@
         if (domFocusField) domFocusField.focus();
       }}
       on:setvisibility={e => {
-        for (const name of selectedColumns) {
-          const column = items.find(x => x.uniqueName == name);
-          if (column) {
-            display.setColumnVisibility(column.uniquePath, e.detail);
+        if (selectedColumns.includes(column.uniqueName)) {
+          for (const name of selectedColumns) {
+            const column = items.find(x => x.uniqueName == name);
+            if (column) {
+              display.setColumnVisibility(column.uniquePath, e.detail);
+            }
           }
         }
       }}
diff --git a/packages/web/src/datagrid/DataGridCore.svelte b/packages/web/src/datagrid/DataGridCore.svelte
index bd3cf4b00..ce4bfd485 100644
--- a/packages/web/src/datagrid/DataGridCore.svelte
+++ b/packages/web/src/datagrid/DataGridCore.svelte
@@ -800,6 +800,7 @@
   // $: console.log('containerHeight', containerHeight);
 
   // $: console.log('COLUMNS', columns);
+  // $: console.log('columnSizes.realCount', columnSizes.realCount);
   // $: console.log('realColumnUniqueNames', realColumnUniqueNames);
   // $: console.log('columnSizes.realCount', columnSizes.realCount);
 
diff --git a/packages/web/src/datagrid/JslDataGridCore.svelte b/packages/web/src/datagrid/JslDataGridCore.svelte
index 90116b39a..a0112eb7d 100644
--- a/packages/web/src/datagrid/JslDataGridCore.svelte
+++ b/packages/web/src/datagrid/JslDataGridCore.svelte
@@ -55,6 +55,7 @@
   import RowsArrayGrider from './RowsArrayGrider';
 
   export let jslid;
+  export let display;
 
   export const activator = createActivator('JslDataGridCore', false);
 
@@ -93,10 +94,12 @@
       initialValues.sourceStorageType = 'archive';
       initialValues.sourceArchiveFolder = archiveMatch[1];
       initialValues.sourceList = [archiveMatch[2]];
+      initialValues[`columns_${archiveMatch[2]}`] = display.getExportColumnMap();
     } else {
       initialValues.sourceStorageType = 'jsldata';
       initialValues.sourceJslId = jslid;
       initialValues.sourceList = ['query-data'];
+      initialValues[`columns_query-data`] = display.getExportColumnMap();
     }
     showModal(ImportExportModal, { initialValues });
   }
@@ -113,7 +116,8 @@
             fileName: archiveMatch[2],
           },
         },
-        fmt
+        fmt,
+        display.getExportColumnMap()
       );
     } else {
       exportQuickExportFile(
@@ -124,7 +128,8 @@
             jslid,
           },
         },
-        fmt
+        fmt,
+        display.getExportColumnMap()
       );
     }
   };
diff --git a/packages/web/src/datagrid/SeriesSizes.ts b/packages/web/src/datagrid/SeriesSizes.ts
index ec62a7404..bb2466e6c 100644
--- a/packages/web/src/datagrid/SeriesSizes.ts
+++ b/packages/web/src/datagrid/SeriesSizes.ts
@@ -99,9 +99,12 @@ export class SeriesSizes {
     }
 
     this.modelIndexes = _.range(0, this.count);
+    // console.log('SeriesSize:build:this.modelIndexes-before', this.modelIndexes);
+    // console.log('SeriesSize:build:this.hiddenAndFrozenModelIndexes', this.hiddenAndFrozenModelIndexes);
     if (this.hiddenAndFrozenModelIndexes) {
       this.modelIndexes = this.modelIndexes.filter(col => !this.hiddenAndFrozenModelIndexes.includes(col));
     }
+    // console.log('SeriesSize:build:this.modelIndexes-result', this.modelIndexes);
   }
 
   public getScrollIndexOnPosition(position: number): number {
diff --git a/packages/web/src/datagrid/SqlDataGridCore.svelte b/packages/web/src/datagrid/SqlDataGridCore.svelte
index 0013c3451..d23d206d7 100644
--- a/packages/web/src/datagrid/SqlDataGridCore.svelte
+++ b/packages/web/src/datagrid/SqlDataGridCore.svelte
@@ -135,6 +135,7 @@
     initialValues.sourceDatabaseName = database;
     initialValues.sourceSql = display.getExportQuery();
     initialValues.sourceList = display.baseTableOrSimilar ? [display.baseTableOrSimilar.pureName] : [];
+    initialValues[`columns_${pureName}`] = display.getExportColumnMap();
     showModal(ImportExportModal, { initialValues });
   }
 
@@ -193,7 +194,8 @@
           sql: display.getExportQuery(),
         },
       },
-      fmt
+      fmt,
+      display.getExportColumnMap()
     );
   };
   registerQuickExportHandler(quickExportHandler);
diff --git a/packages/web/src/datagrid/gridutil.ts b/packages/web/src/datagrid/gridutil.ts
index 3b9e26ef3..499368d65 100644
--- a/packages/web/src/datagrid/gridutil.ts
+++ b/packages/web/src/datagrid/gridutil.ts
@@ -17,6 +17,7 @@ export function countColumnSizes(grider: Grider, columns, containerWidth, displa
   //return this.context.measureText(txt).width;
 
   // console.log('countColumnSizes', loadedRows.length, containerWidth);
+  // console.log('countColumnSizes:columns', columns);
 
   columnSizes.maxSize = (containerWidth * 2) / 3;
   columnSizes.count = columns.length;
@@ -114,10 +115,12 @@ export function countVisibleRealColumns(columnSizes, firstVisibleColumnScrollInd
   ) {
     visibleRealColumnIndexes.push(colIndex + columnSizes.frozenCount);
   }
+  // console.log('countVisibleRealColumns:visibleRealColumnIndexes', visibleRealColumnIndexes);
 
   // real columns
   for (let colIndex of visibleRealColumnIndexes) {
     let modelColumnIndex = columnSizes.realToModel(colIndex);
+    // console.log('countVisibleRealColumns:modelColumnIndex', modelColumnIndex);
     modelIndexes[colIndex] = modelColumnIndex;
 
     let col = columns[modelColumnIndex];
@@ -129,6 +132,7 @@ export function countVisibleRealColumns(columnSizes, firstVisibleColumnScrollInd
       width,
     });
   }
+  // console.log('countVisibleRealColumns:realColumns', realColumns);
   return realColumns;
 }
 
diff --git a/packages/web/src/elements/TableControl.svelte b/packages/web/src/elements/TableControl.svelte
index e68377345..d22a01524 100644
--- a/packages/web/src/elements/TableControl.svelte
+++ b/packages/web/src/elements/TableControl.svelte
@@ -24,6 +24,7 @@
   export let selectedIndex = 0;
   export let clickable = false;
   export let disableFocusOutline = false;
+  export let emptyMessage = null;
 
   export let domTable = undefined;
 
@@ -99,6 +100,11 @@
         {/each}
       </tr>
     {/each}
+    {#if emptyMessage && rows.length == 0}
+      <tr>
+        <td colspan={columnList.length}>{emptyMessage}</td>
+      </tr>
+    {/if}
   </tbody>
 </table>
 
diff --git a/packages/web/src/freetable/FreeTableGridCore.svelte b/packages/web/src/freetable/FreeTableGridCore.svelte
index 31b8c0b8f..2352b47da 100644
--- a/packages/web/src/freetable/FreeTableGridCore.svelte
+++ b/packages/web/src/freetable/FreeTableGridCore.svelte
@@ -16,6 +16,7 @@
   import { createGridCache, FreeTableGridDisplay } from 'dbgate-datalib';
   import { writable } from 'svelte/store';
   import uuidv1 from 'uuid/v1';
+  import { registerQuickExportHandler } from '../buttons/ToolStripExportButton.svelte';
   import registerCommand from '../commands/registerCommand';
 
   import DataGridCore from '../datagrid/DataGridCore.svelte';
@@ -24,6 +25,8 @@
   import { apiCall } from '../utility/api';
   import { registerMenu } from '../utility/contextMenu';
   import createActivator, { getActiveComponent } from '../utility/createActivator';
+  import createQuickExportMenu from '../utility/createQuickExportMenu';
+  import { exportQuickExportFile } from '../utility/exportFileTools';
   import FreeTableGrider from './FreeTableGrider';
   import MacroPreviewGrider from './MacroPreviewGrider';
 
@@ -51,10 +54,31 @@
     initialValues.sourceStorageType = 'jsldata';
     initialValues.sourceJslId = jslid;
     initialValues.sourceList = ['editor-data'];
+    initialValues[`columns_editor-data`] = display.getExportColumnMap();
     showModal(ImportExportModal, { initialValues: initialValues });
   }
 
-  registerMenu({ command: 'freeTableGrid.export', tag: 'export' });
+  const quickExportHandler = fmt => async () => {
+    const jslid = uuidv1();
+    await apiCall('jsldata/save-free-table', { jslid, data: modelState.value });
+    exportQuickExportFile(
+      'editor-data',
+      {
+        functionName: 'jslDataReader',
+        props: {
+          jslid,
+        },
+      },
+      fmt,
+      display.getExportColumnMap()
+    );
+  };
+  registerQuickExportHandler(quickExportHandler);
+
+  registerMenu(() => ({
+    ...createQuickExportMenu(quickExportHandler, { command: 'freeTableGrid.export' }),
+    tag: 'export',
+  }));
 </script>
 
 <DataGridCore {...$$props} {grider} {display} frameSelection={!!macroPreview} bind:selectedCellsPublished />
diff --git a/packages/web/src/impexp/ImportExportConfigurator.svelte b/packages/web/src/impexp/ImportExportConfigurator.svelte
index dfbddfc4e..4ed7fcabc 100644
--- a/packages/web/src/impexp/ImportExportConfigurator.svelte
+++ b/packages/web/src/impexp/ImportExportConfigurator.svelte
@@ -42,11 +42,14 @@
 <script lang="ts">
   import { onMount } from 'svelte';
   import { writable } from 'svelte/store';
+  import Link from '../elements/Link.svelte';
   import TableControl from '../elements/TableControl.svelte';
   import CheckboxField from '../forms/CheckboxField.svelte';
   import { getFormContext } from '../forms/FormProviderCore.svelte';
   import TextField from '../forms/TextField.svelte';
   import FontIcon from '../icons/FontIcon.svelte';
+  import ColumnMapModal from '../modals/ColumnMapModal.svelte';
+  import { showModal } from '../modals/modalTools';
   import { findFileFormat } from '../plugins/fileformats';
   import { extensions } from '../stores';
   import getAsArray from '../utility/getAsArray';
@@ -189,6 +192,11 @@
           header: 'Preview',
           slot: 0,
         },
+        {
+          fieldName: 'columns',
+          header: 'Columns',
+          slot: 2,
+        },
       ]}
     >
       <svelte:fragment slot="0" let:row>
@@ -214,6 +222,18 @@
             )}
         />
       </svelte:fragment>
+      <svelte:fragment slot="2" let:row>
+        {@const columnCount = ($values[`columns_${row}`] || []).filter(x => !x.skip).length}
+        <Link
+          onClick={() => {
+            showModal(ColumnMapModal, {
+              value: $values[`columns_${row}`],
+              onConfirm: value => setFieldValue(`columns_${row}`, value),
+            });
+          }}
+          >{columnCount > 0 ? `(${columnCount} columns)` : '(copy from source)'}
+        </Link>
+      </svelte:fragment>
     </TableControl>
   </div>
 </div>
diff --git a/packages/web/src/impexp/ScriptWriter.ts b/packages/web/src/impexp/ScriptWriter.ts
index 95c729573..53dd3b6f5 100644
--- a/packages/web/src/impexp/ScriptWriter.ts
+++ b/packages/web/src/impexp/ScriptWriter.ts
@@ -25,12 +25,20 @@ export default class ScriptWriter {
     this.packageNames.push(...extractShellApiPlugins(functionName, props));
   }
 
+  assignValue(variableName, jsonValue) {
+    this.put(`const ${variableName} = ${JSON.stringify(jsonValue)};`);
+  }
+
   requirePackage(packageName) {
     this.packageNames.push(packageName);
   }
 
-  copyStream(sourceVar, targetVar) {
-    this.put(`await dbgateApi.copyStream(${sourceVar}, ${targetVar});`);
+  copyStream(sourceVar, targetVar, colmapVar = null) {
+    if (colmapVar) {
+      this.put(`await dbgateApi.copyStream(${sourceVar}, ${targetVar}, {columns: ${colmapVar}});`);
+    } else {
+      this.put(`await dbgateApi.copyStream(${sourceVar}, ${targetVar});`);
+    }
   }
 
   comment(s) {
diff --git a/packages/web/src/impexp/createImpExpScript.ts b/packages/web/src/impexp/createImpExpScript.ts
index 0f35bcc73..197caa9d0 100644
--- a/packages/web/src/impexp/createImpExpScript.ts
+++ b/packages/web/src/impexp/createImpExpScript.ts
@@ -160,6 +160,21 @@ function getTargetExpr(extensions, sourceName, values, targetConnection, targetD
   throw new Error(`Unknown target storage type: ${targetStorageType}`);
 }
 
+export function normalizeExportColumnMap(colmap) {
+  if (!colmap) {
+    return null;
+  }
+  if (!colmap.find(x => !x.ignore)) {
+    // all values are ignored, ignore column map
+    return null;
+  }
+  colmap = colmap.filter(x => !x.skip);
+  if (colmap.length > 0) {
+    return colmap.map(x => _.omit(x, ['ignore']));
+  }
+  return null;
+}
+
 export default async function createImpExpScript(extensions, values, addEditorInfo = true) {
   const script = new ScriptWriter(values.startVariableIndex || 0);
 
@@ -186,7 +201,15 @@ export default async function createImpExpScript(extensions, values, addEditorIn
     // @ts-ignore
     script.assign(targetVar, ...getTargetExpr(extensions, sourceName, values, targetConnection, targetDriver));
 
-    script.copyStream(sourceVar, targetVar);
+    const colmap = normalizeExportColumnMap(values[`columns_${sourceName}`] );
+
+    let colmapVar = null;
+    if (colmap) {
+      colmapVar = script.allocVariable();
+      script.assignValue(colmapVar, colmap);
+    }
+
+    script.copyStream(sourceVar, targetVar, colmapVar);
     script.put();
   }
   if (addEditorInfo) {
diff --git a/packages/web/src/modals/ColumnMapModal.svelte b/packages/web/src/modals/ColumnMapModal.svelte
new file mode 100644
index 000000000..7b2ac200c
--- /dev/null
+++ b/packages/web/src/modals/ColumnMapModal.svelte
@@ -0,0 +1,91 @@
+<script lang="ts">
+  import FormStyledButton from '../buttons/FormStyledButton.svelte';
+  import Link from '../elements/Link.svelte';
+  import TableControl from '../elements/TableControl.svelte';
+  import CheckboxField from '../forms/CheckboxField.svelte';
+
+  import FormProvider from '../forms/FormProvider.svelte';
+  import FormSubmit from '../forms/FormSubmit.svelte';
+  import TextField from '../forms/TextField.svelte';
+  import ModalBase from './ModalBase.svelte';
+  import { closeCurrentModal } from './modalTools';
+
+  export let header = 'Configure columns';
+  export let onConfirm;
+  export let value = [];
+</script>
+
+<FormProvider>
+  <ModalBase {...$$restProps}>
+    <div slot="header">{header}</div>
+
+    <div class="m-3">
+      When no columns are defined in this mapping, source row is copied to target without any modifications
+    </div>
+
+    <TableControl
+      columns={[
+        { fieldName: 'use', header: 'Use', slot: 4 },
+        { fieldName: 'src', header: 'Source column', slot: 1 },
+        { fieldName: 'dst', header: 'Target column', slot: 2 },
+        { fieldName: 'actions', header: '', slot: 3 },
+      ]}
+      rows={value || []}
+      emptyMessage="No transform defined"
+    >
+      <svelte:fragment slot="4" let:row let:index>
+        <CheckboxField
+          checked={!row['skip']}
+          on:change={e =>
+            (value = (value || []).map((x, i) => (i == index ? { ...x, skip: !e.target.checked, ignore: false } : x)))}
+        />
+      </svelte:fragment>
+      <svelte:fragment slot="1" let:row let:index>
+        <TextField
+          value={row['src']}
+          on:change={e =>
+            (value = (value || []).map((x, i) => (i == index ? { ...x, src: e.target.value, ignore: false } : x)))}
+        />
+      </svelte:fragment>
+      <svelte:fragment slot="2" let:row let:index>
+        <TextField
+          value={row['dst']}
+          on:change={e =>
+            (value = (value || []).map((x, i) => (i == index ? { ...x, dst: e.target.value, ignore: false } : x)))}
+        />
+      </svelte:fragment>
+      <svelte:fragment slot="3" let:index>
+        <Link
+          onClick={() => {
+            value = value.filter((x, i) => i != index);
+          }}>Remove</Link
+        >
+      </svelte:fragment>
+    </TableControl>
+
+    <svelte:fragment slot="footer">
+      <FormSubmit
+        value="OK"
+        on:click={() => {
+          closeCurrentModal();
+          onConfirm(!value || value.length == 0 ? null : value);
+        }}
+      />
+      <FormStyledButton type="button" value="Close" on:click={closeCurrentModal} />
+      <FormStyledButton
+        type="button"
+        value="Add column"
+        on:click={() => {
+          value = [...(value || []), {}];
+        }}
+      />
+      <FormStyledButton
+        type="button"
+        value="Reset"
+        on:click={() => {
+          value = [];
+        }}
+      />
+    </svelte:fragment>
+  </ModalBase>
+</FormProvider>
diff --git a/packages/web/src/tabs/FreeTableTab.svelte b/packages/web/src/tabs/FreeTableTab.svelte
index d01bc3005..cf632396e 100644
--- a/packages/web/src/tabs/FreeTableTab.svelte
+++ b/packages/web/src/tabs/FreeTableTab.svelte
@@ -34,7 +34,7 @@
   import { writable } from 'svelte/store';
   import ToolStripCommandButton from '../buttons/ToolStripCommandButton.svelte';
   import ToolStripContainer from '../buttons/ToolStripContainer.svelte';
-import ToolStripExportButton from '../buttons/ToolStripExportButton.svelte';
+  import ToolStripExportButton, { createQuickExportHandlerRef } from '../buttons/ToolStripExportButton.svelte';
   import registerCommand from '../commands/registerCommand';
   import DataGrid from '../datagrid/DataGrid.svelte';
   import ErrorInfo from '../elements/ErrorInfo.svelte';
@@ -137,6 +137,8 @@ import ToolStripExportButton from '../buttons/ToolStripExportButton.svelte';
 
   // display is overridden in FreeTableGridCore, this is because of column manager
   $: display = new FreeTableGridDisplay($modelState.value, $config, config.update, null, null);
+
+  const quickExportHandlerRef = createQuickExportHandlerRef();
 </script>
 
 {#if isLoading}
@@ -161,7 +163,7 @@ import ToolStripExportButton from '../buttons/ToolStripExportButton.svelte';
     />
     <svelte:fragment slot="toolstrip">
       <ToolStripCommandButton command="freeTable.save" />
-      <ToolStripExportButton command="freeTableGrid.export" />
+      <ToolStripExportButton command="freeTableGrid.export" {quickExportHandlerRef} />
     </svelte:fragment>
   </ToolStripContainer>
 {/if}
diff --git a/packages/web/src/tabs/JsonEditorTab.svelte b/packages/web/src/tabs/JsonEditorTab.svelte
index e9a1e51e4..030a0c7cb 100644
--- a/packages/web/src/tabs/JsonEditorTab.svelte
+++ b/packages/web/src/tabs/JsonEditorTab.svelte
@@ -22,6 +22,8 @@
   import useEditorData from '../query/useEditorData';
   import invalidateCommands from '../commands/invalidateCommands';
   import createActivator, { getActiveComponent } from '../utility/createActivator';
+  import ToolStripContainer from '../buttons/ToolStripContainer.svelte';
+  import ToolStripSaveButton from '../buttons/ToolStripSaveButton.svelte';
 
   export let tabid;
 
@@ -70,14 +72,20 @@
   }
 </script>
 
-<AceEditor
-  value={$editorState.value || ''}
-  menu={createMenu()}
-  on:input={e => setEditorData(e.detail)}
-  on:focus={() => {
-    activator.activate();
-    invalidateCommands();
-  }}
-  bind:this={domEditor}
-  mode="json"
-/>
+<ToolStripContainer>
+  <AceEditor
+    value={$editorState.value || ''}
+    menu={createMenu()}
+    on:input={e => setEditorData(e.detail)}
+    on:focus={() => {
+      activator.activate();
+      invalidateCommands();
+    }}
+    bind:this={domEditor}
+    mode="json"
+  />
+
+  <svelte:fragment slot="toolstrip">
+    <ToolStripSaveButton idPrefix="json" />
+  </svelte:fragment>
+</ToolStripContainer>
diff --git a/packages/web/src/utility/exportFileTools.ts b/packages/web/src/utility/exportFileTools.ts
index 91cf2c798..9d3e76a53 100644
--- a/packages/web/src/utility/exportFileTools.ts
+++ b/packages/web/src/utility/exportFileTools.ts
@@ -3,8 +3,9 @@ import getElectron from './getElectron';
 import { showSnackbar, showSnackbarInfo, showSnackbarError, closeSnackbar } from '../utility/snackbar';
 import resolveApi from './resolveApi';
 import { apiCall, apiOff, apiOn } from './api';
+import { normalizeExportColumnMap } from '../impexp/createImpExpScript';
 
-export async function exportQuickExportFile(dataName, reader, format) {
+export async function exportQuickExportFile(dataName, reader, format, columnMap = null) {
   const electron = getElectron();
 
   let filePath;
@@ -31,7 +32,14 @@ export async function exportQuickExportFile(dataName, reader, format) {
   const writer = format.createWriter(filePath, dataName);
   script.assign(targetVar, writer.functionName, writer.props);
 
-  script.copyStream(sourceVar, targetVar);
+  const colmap = normalizeExportColumnMap(columnMap);
+  let colmapVar = null;
+  if (colmap) {
+    colmapVar = script.allocVariable();
+    script.assignValue(colmapVar, colmap);
+  }
+
+  script.copyStream(sourceVar, targetVar, colmapVar);
   script.put();
 
   const resp = await apiCall('runners/start', { script: script.getScript() });
diff --git a/packages/web/src/widgets/AppFilesList.svelte b/packages/web/src/widgets/AppFilesList.svelte
index c4f34cbe8..3c50951ab 100644
--- a/packages/web/src/widgets/AppFilesList.svelte
+++ b/packages/web/src/widgets/AppFilesList.svelte
@@ -37,6 +37,7 @@
   import { useAppFiles, useArchiveFolders } from '../utility/metadataLoaders';
   import openNewTab from '../utility/openNewTab';
   import WidgetsInnerContainer from './WidgetsInnerContainer.svelte';
+  import { showSnackbarError } from '../utility/snackbar';
 
   let filter = '';
 
@@ -66,12 +67,27 @@
     });
   }
 
+  async function handleNewConfigFile(fileName, content) {
+    if (!(await apiCall('apps/create-config-file', { fileName, content, appFolder: $currentApplication }))) {
+      showSnackbarError('File not created, probably already exists');
+    }
+  }
+
   function createAddMenu() {
     return [
       {
         text: 'New SQL command',
         onClick: () => handleNewSqlFile('command.sql', 'Create new SQL command', COMMAND_TEMPLATE),
       },
+      {
+        text: 'New virtual references file',
+        onClick: () => handleNewConfigFile('virtual-references.config.json', []),
+      },
+      {
+        text: 'New disctionary descriptions file',
+        onClick: () => handleNewConfigFile('dictionary-descriptions.config.json', []),
+      },
+
       // { text: 'New query view', onClick: () => handleNewSqlFile('query.sql', 'Create new SQL query', QUERY_TEMPLATE) },
     ];
   }
diff --git a/packages/web/src/widgets/TabsPanel.svelte b/packages/web/src/widgets/TabsPanel.svelte
index 17220e4bf..bf3345e15 100644
--- a/packages/web/src/widgets/TabsPanel.svelte
+++ b/packages/web/src/widgets/TabsPanel.svelte
@@ -387,15 +387,17 @@
             draggingDbGroupTarget = null;
           }}
         >
-          <FontIcon icon={getDbIcon(tabGroup.tabDbKey)} padRight />
-          {tabGroup.tabDbName}
+          <div class="db-name-inner">
+            <FontIcon icon={getDbIcon(tabGroup.tabDbKey)} />
+            {tabGroup.tabDbName}
+          </div>
 
-          <span
+          <div
             class="close-button-right tabCloseButton"
             on:click={e => closeMultipleTabs(tab => tabGroup.tabs.find(x => x.tabid == tab.tabid))}
           >
             <FontIcon icon="icon close" />
-          </span>
+          </div>
         </div>
         <div class="db-group">
           {#each tabGroup.tabs as tab}
@@ -505,7 +507,10 @@
     overflow: hidden;
     text-overflow: ellipsis;
     white-space: nowrap;
+  }
+  .db-name-inner {
     justify-content: center;
+    flex-grow: 1;
   }
   /* .db-name:hover {
     background-color: var(--theme-bg-3);
@@ -541,7 +546,6 @@
     margin-left: 5px;
     margin-right: 5px;
     color: var(--theme-font-3);
-    float: right;
   }
 
   .close-button:hover {
diff --git a/yarn.lock b/yarn.lock
index 9d96cc456..7d8923f23 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3199,6 +3199,11 @@ dbgate-plugin-tools@^1.0.4, dbgate-plugin-tools@^1.0.7:
     pacote "^11.1.13"
     rimraf "^3.0.2"
 
+dbgate-plugin-xml@^4.1.1:
+  version "4.7.2"
+  resolved "https://registry.yarnpkg.com/dbgate-plugin-xml/-/dbgate-plugin-xml-4.7.2.tgz#4a1817a7fc3b1ac5191e45dc7b1016b2f97c3158"
+  integrity sha512-LA52/Wg+blaRp/H+v4ypT+l6kbi4sYsTD/JdPaTbfwErMXhGZew9wtDolvbDjKZZ/zfRig0TDXj9fhLILw2cGw==
+
 debug@2.6.9, debug@^2.2.0, debug@^2.3.3:
   version "2.6.9"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
@@ -3488,6 +3493,11 @@ dot-prop@^4.1.0:
   dependencies:
     is-obj "^1.0.0"
 
+dotenv@^16.0.0:
+  version "16.0.0"
+  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-16.0.0.tgz#c619001253be89ebb638d027b609c75c26e47411"
+  integrity sha512-qD9WU0MPM4SWLPJy/r2Be+2WgQj8plChsyrCNQzW/0WjvcJQiKQJ9mH3ZgB3fxbUUxgc/11ZJ0Fi5KiimWGz2Q==
+
 duplexer2@~0.0.2:
   version "0.0.2"
   resolved "https://registry.yarnpkg.com/duplexer2/-/duplexer2-0.0.2.tgz#c614dcf67e2fb14995a91711e5a617e8a60a31db"