diff --git a/b_asic/gui_utils/plot_window.py b/b_asic/gui_utils/plot_window.py
index 96d6bda00e4697b08c62171d35e124ad1e689558..77babe1f7e732386b199581507e1ee88c50b5645 100644
--- a/b_asic/gui_utils/plot_window.py
+++ b/b_asic/gui_utils/plot_window.py
@@ -226,9 +226,10 @@ def start_simulation_dialog(
     sfg_name : str, optional
         The name of the SFG.
     """
-    QApplication(sys.argv)
+    app = QApplication(sys.argv)
     win = PlotWindow(sim_result=sim_results, sfg_name=sfg_name)
-    win.exec_()
+    win.show()
+    sys.exit(app.exec_())
 
 
 # Simple test of the dialog