diff --git a/packages/api/src/controllers/jsldata.js b/packages/api/src/controllers/jsldata.js
index 8b0d29ffa..4778e2f59 100644
--- a/packages/api/src/controllers/jsldata.js
+++ b/packages/api/src/controllers/jsldata.js
@@ -101,13 +101,14 @@ module.exports = {
   // },
 
   async ensureDatastore(jslid, formatterFunction) {
-    const rowFormatter = requirePluginFunction(formatterFunction);
-    const dskey = `${jslid}||${formatterFunction}`;
-    let datastore = this.datastores[dskey];
-    if (!datastore) {
-      datastore = new JsonLinesDatastore(getJslFileName(jslid), rowFormatter);
+    let datastore = this.datastores[jslid];
+    if (!datastore || datastore.formatterFunction != formatterFunction) {
+      if (datastore) {
+        datastore._closeReader();
+      }
+      datastore = new JsonLinesDatastore(getJslFileName(jslid), formatterFunction);
       // datastore = new DatastoreProxy(getJslFileName(jslid));
-      this.datastores[dskey] = datastore;
+      this.datastores[jslid] = datastore;
     }
     return datastore;
   },
diff --git a/packages/api/src/utility/JsonLinesDatastore.js b/packages/api/src/utility/JsonLinesDatastore.js
index b3a2005d8..a5e12da47 100644
--- a/packages/api/src/utility/JsonLinesDatastore.js
+++ b/packages/api/src/utility/JsonLinesDatastore.js
@@ -3,6 +3,7 @@ const AsyncLock = require('async-lock');
 const lock = new AsyncLock();
 const stableStringify = require('json-stable-stringify');
 const { evaluateCondition } = require('dbgate-sqltree');
+const requirePluginFunction = require('./requirePluginFunction');
 
 function fetchNextLineFromReader(reader) {
   return new Promise((resolve, reject) => {
@@ -22,15 +23,16 @@ function fetchNextLineFromReader(reader) {
 }
 
 class JsonLinesDatastore {
-  constructor(file, rowFormatter) {
+  constructor(file, formatterFunction) {
     this.file = file;
-    this.rowFormatter = rowFormatter;
+    this.formatterFunction = formatterFunction;
     this.reader = null;
     this.readedDataRowCount = 0;
     this.readedSchemaRow = false;
     // this.firstRowToBeReturned = null;
     this.notifyChangedCallback = null;
     this.currentFilter = null;
+    this.rowFormatter = requirePluginFunction(formatterFunction);
   }
 
   _closeReader() {
diff --git a/packages/web/src/appobj/ArchiveFileAppObject.svelte b/packages/web/src/appobj/ArchiveFileAppObject.svelte
index e77e42e31..4cecca45d 100644
--- a/packages/web/src/appobj/ArchiveFileAppObject.svelte
+++ b/packages/web/src/appobj/ArchiveFileAppObject.svelte
@@ -213,12 +213,12 @@
                 icon: 'img profiler',
                 tabComponent: 'ProfilerTab',
                 props: {
-                  jslid: `archive://${data.folderName}/${data.fileName}`,
-                  // engine: eng.engine,
-                  profilerFormatterFunction: eng.profilerFormatterFunction,
-                  profilerTimestampFunction: eng.profilerTimestampFunction,
-                  profilerChartAggregateFunction: eng.profilerChartAggregateFunction,
-                  profilerChartMeasures: eng.profilerChartMeasures,
+                  jslidLoad: `archive://${data.folderName}/${data.fileName}`,
+                  engine: eng.engine,
+                  // profilerFormatterFunction: eng.profilerFormatterFunction,
+                  // profilerTimestampFunction: eng.profilerTimestampFunction,
+                  // profilerChartAggregateFunction: eng.profilerChartAggregateFunction,
+                  // profilerChartMeasures: eng.profilerChartMeasures,
                 },
               });
             },
diff --git a/packages/web/src/tabs/ProfilerTab.svelte b/packages/web/src/tabs/ProfilerTab.svelte
index ae691bdb5..774f6d4de 100644
--- a/packages/web/src/tabs/ProfilerTab.svelte
+++ b/packages/web/src/tabs/ProfilerTab.svelte
@@ -56,13 +56,12 @@
 
   export let conid;
   export let database;
-  export let jslid;
-  export let profilerFormatterFunction;
-  export let profilerTimestampFunction;
-  export let profilerChartAggregateFunction;
-  export let profilerChartMeasures;
+  export let engine;
+  export let jslidLoad;
 
-  let profiling = false;
+  let jslidSession;
+
+  let isProfiling = false;
   let sessionId;
   let isLoadingChart = false;
 
@@ -70,7 +69,8 @@
   let chartData;
 
   $: connection = useConnectionInfo({ conid });
-  $: driver = findEngineDriver($connection, $extensions);
+  $: driver = findEngineDriver(engine || $connection, $extensions);
+  $: jslid = jslidSession || jslidLoad;
 
   onMount(() => {
     intervalId = setInterval(() => {
@@ -80,22 +80,20 @@
         });
       }
     }, 15 * 1000);
+  });
 
-    if (jslid) {
+  $: {
+    if (jslidLoad && driver) {
       loadChart();
     }
-  });
+  }
 
   onDestroy(() => {
     clearInterval(intervalId);
   });
 
-  export function isProfiling() {
-    return profiling;
-  }
-
   export async function startProfiling() {
-    profiling = true;
+    isProfiling = true;
 
     let sesid = sessionId;
     if (!sesid) {
@@ -110,7 +108,7 @@
     const resp = await apiCall('sessions/start-profiler', {
       sesid,
     });
-    jslid = resp.jslid;
+    jslidSession = resp.jslid;
 
     invalidateCommands();
   }
@@ -123,15 +121,15 @@
     isLoadingChart = true;
 
     const colors = randomcolor({
-      count: (profilerChartMeasures || driver.profilerChartMeasures).length,
+      count: driver.profilerChartMeasures.length,
       seed: 5,
     });
 
     const data = await apiCall('jsldata/extract-timeline-chart', {
       jslid,
-      timestampFunction: profilerTimestampFunction || driver.profilerTimestampFunction,
-      aggregateFunction: profilerChartAggregateFunction || driver.profilerChartAggregateFunction,
-      measures: profilerChartMeasures || driver.profilerChartMeasures,
+      timestampFunction: driver.profilerTimestampFunction,
+      aggregateFunction: driver.profilerChartAggregateFunction,
+      measures: driver.profilerChartMeasures,
     });
     chartData = {
       ...data,
@@ -145,8 +143,10 @@
   }
 
   export async function stopProfiling() {
-    profiling = false;
-    apiCall('sessions/stop-profiler', { sesid: sessionId });
+    isProfiling = false;
+    await apiCall('sessions/stop-profiler', { sesid: sessionId });
+    await apiCall('sessions/kill', { sesid: sessionId });
+    sessionId = null;
 
     invalidateCommands();
 
@@ -158,7 +158,7 @@
   }
 
   export function saveEnabled() {
-    return !!jslid;
+    return !!jslidSession;
   }
 
   async function doSave(folder, file) {
@@ -199,11 +199,9 @@
   {#if jslid}
     <VerticalSplitter allowCollapseChild1 allowCollapseChild2>
       <svelte:fragment slot="1">
-        <JslDataGrid
-          {jslid}
-          listenInitializeFile
-          formatterFunction={profilerFormatterFunction || driver?.profilerFormatterFunction}
-        />
+        {#key jslid}
+          <JslDataGrid {jslid} listenInitializeFile formatterFunction={driver?.profilerFormatterFunction} />
+        {/key}
       </svelte:fragment>
       <svelte:fragment slot="2">
         {#if isLoadingChart}