update main file to create application and check for wizard need

main.py

@@ -1,4 +1,19 @@
+from src import first_launch, settings
+from src.ui.widgets.welcome_wizard import launch_wizard as startup
+from PySide6 import QtWidgets
+import sys
 from src.ui.userInterface import launch_gui as UI
 
+
 if __name__ == "__main__":
+    app = QtWidgets.QApplication(sys.argv)
+    if not first_launch:
+        setup = startup()
+        if setup == 1:
+            settings.reload()
+            # kill qApplication singleton
+            UI()
+        else:
+            sys.exit()
+    else:
         UI()