diff --git a/CHANGELOG.md b/CHANGELOG.md
index e115c460e..ee6be1a95 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,7 @@ All notable changes to this project will be documented in this file.
 - [#2178] Undo on sprites
 - [#2176] Reset letterspacing on text import
 - Nullpointer on recent searches loader
+- [#2177] Leftover process when invalid SWF opened - now main window is shown
 
 ## [20.1.0] - 2023-12-30
 ### Added
@@ -3372,6 +3373,7 @@ Major version of SWF to XML export changed to 2.
 [#2174]: https://www.free-decompiler.com/flash/issues/2174
 [#2175]: https://www.free-decompiler.com/flash/issues/2175
 [#2178]: https://www.free-decompiler.com/flash/issues/2178
+[#2177]: https://www.free-decompiler.com/flash/issues/2177
 [#2100]: https://www.free-decompiler.com/flash/issues/2100
 [#2123]: https://www.free-decompiler.com/flash/issues/2123
 [#2119]: https://www.free-decompiler.com/flash/issues/2119
diff --git a/src/com/jpexs/decompiler/flash/gui/LoadingDialog.java b/src/com/jpexs/decompiler/flash/gui/LoadingDialog.java
index 837268ce8..42ab7c059 100644
--- a/src/com/jpexs/decompiler/flash/gui/LoadingDialog.java
+++ b/src/com/jpexs/decompiler/flash/gui/LoadingDialog.java
@@ -99,9 +99,7 @@ public class LoadingDialog extends AppDialog {
         addWindowListener(new WindowAdapter() {
             @Override
             public void windowClosing(WindowEvent e) {
-                if (Main.shouldCloseWhenClosingLoadingDialog) {
-                    System.exit(0);
-                } else if (worker != null) {
+                if (worker != null) {
                     worker.cancel(true);
                 }
             }
diff --git a/src/com/jpexs/decompiler/flash/gui/Main.java b/src/com/jpexs/decompiler/flash/gui/Main.java
index 051fe910e..9f3c19953 100644
--- a/src/com/jpexs/decompiler/flash/gui/Main.java
+++ b/src/com/jpexs/decompiler/flash/gui/Main.java
@@ -183,8 +183,6 @@ public class Main {
 
     public static DebugLogDialog debugDialog;
 
-    public static boolean shouldCloseWhenClosingLoadingDialog;
-
     private static Debugger flashDebugger;
 
     private static DebuggerHandler debugHandler = null;
@@ -1660,12 +1658,15 @@ public class Main {
                 }
             }
 
-            loadingDialog.setVisible(false);
-            shouldCloseWhenClosingLoadingDialog = false;
-
             final SWF fswf = firstSWF;
             final Openable fopenable = firstOpenable;
-            View.execInEventDispatch(() -> {
+            View.execInEventDispatch(() -> {                
+                if (mainFrame == null) {
+                    Main.startWork(AppStrings.translate("work.creatingwindow") + "...", null);
+                    ensureMainFrame();
+                }
+                loadingDialog.setVisible(false);            
+                
                 if (mainFrame != null) {
                     mainFrame.setVisible(true);
                 }
@@ -2844,7 +2845,6 @@ public class Main {
             if (filesToOpen != null && filesToOpen.length > 0) {
                 initGui();
                 View.execInEventDispatch(() -> {
-                    shouldCloseWhenClosingLoadingDialog = true;
                     if (Configuration.allowOnlyOneInstance.get() && FirstInstance.openFiles(Arrays.asList(filesToOpen))) { //Try to open in first instance
                         Main.exit();
                     } else {