diff --git a/PowerEditor/src/WinControls/DockingWnd/DockingManager.cpp b/PowerEditor/src/WinControls/DockingWnd/DockingManager.cpp
index c9dc3b26b..2a4a46c0d 100644
--- a/PowerEditor/src/WinControls/DockingWnd/DockingManager.cpp
+++ b/PowerEditor/src/WinControls/DockingWnd/DockingManager.cpp
@@ -565,6 +565,17 @@ void DockingManager::reSizeTo(RECT & rc)
 
 void DockingManager::createDockableDlg(tTbData data, int iCont, bool isVisible)
 {
+	// try to make bmp icon transparent
+	if ((data.uMask & DWS_ICONTAB) == DWS_ICONTAB && data.hIconTab != nullptr)
+	{
+		const int iconSize = DPIManagerV2::scale(g_dockingContTabIconSize, data.hClient);
+		HIMAGELIST hImageList = ::ImageList_Create(iconSize, iconSize, ILC_COLOR32 | ILC_MASK, 0, 0);
+		::ImageList_AddIcon(hImageList, data.hIconTab);
+		::DestroyIcon(data.hIconTab);
+		data.hIconTab = ::ImageList_GetIcon(hImageList, 0, ILD_TRANSPARENT);
+		::ImageList_Destroy(hImageList);
+	}
+
 	if ((data.uMask & DWS_USEOWNDARKMODE) != DWS_USEOWNDARKMODE && NppDarkMode::isEnabledForPlugins())
 	{
 		NppDarkMode::autoSubclassAndThemePluginDockWindow(data.hClient);
diff --git a/PowerEditor/src/icons/standard/panels/tabbar/asciiPanel.ico b/PowerEditor/src/icons/standard/panels/tabbar/asciiPanel.ico
index dd9436656..8899f1499 100644
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diff --git a/PowerEditor/src/icons/standard/panels/tabbar/clipboardPanel.ico b/PowerEditor/src/icons/standard/panels/tabbar/clipboardPanel.ico
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diff --git a/PowerEditor/src/icons/standard/panels/tabbar/docList.ico b/PowerEditor/src/icons/standard/panels/tabbar/docList.ico
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diff --git a/PowerEditor/src/icons/standard/panels/tabbar/docMap.ico b/PowerEditor/src/icons/standard/panels/tabbar/docMap.ico
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diff --git a/PowerEditor/src/icons/standard/panels/tabbar/fileBrowser.ico b/PowerEditor/src/icons/standard/panels/tabbar/fileBrowser.ico
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diff --git a/PowerEditor/src/icons/standard/panels/tabbar/findResult.ico b/PowerEditor/src/icons/standard/panels/tabbar/findResult.ico
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diff --git a/PowerEditor/src/icons/standard/panels/tabbar/functionList.ico b/PowerEditor/src/icons/standard/panels/tabbar/functionList.ico
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diff --git a/PowerEditor/src/icons/standard/panels/tabbar/projectPanel.ico b/PowerEditor/src/icons/standard/panels/tabbar/projectPanel.ico
index a71e54f3d..1df3d1897 100644
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diff --git a/PowerEditor/src/icons/standard/tabbar/monitoring.ico b/PowerEditor/src/icons/standard/tabbar/monitoring.ico
index b0b6f5599..ee5f44b06 100644
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diff --git a/PowerEditor/src/icons/standard/tabbar/readonly.ico b/PowerEditor/src/icons/standard/tabbar/readonly.ico
index b545cbc8b..24308f935 100644
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diff --git a/PowerEditor/src/icons/standard/tabbar/readonly_alt.ico b/PowerEditor/src/icons/standard/tabbar/readonly_alt.ico
index 3c1196c98..6b33a447a 100644
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diff --git a/PowerEditor/src/icons/standard/tabbar/saved.ico b/PowerEditor/src/icons/standard/tabbar/saved.ico
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diff --git a/PowerEditor/src/icons/standard/tabbar/saved_alt.ico b/PowerEditor/src/icons/standard/tabbar/saved_alt.ico
index 77ea185be..912bb26be 100644
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diff --git a/PowerEditor/src/icons/standard/tabbar/unsaved.ico b/PowerEditor/src/icons/standard/tabbar/unsaved.ico
index 919f73ce4..6cb856742 100644
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diff --git a/PowerEditor/src/icons/standard/tabbar/unsaved_alt.ico b/PowerEditor/src/icons/standard/tabbar/unsaved_alt.ico
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