Guard to avoid issues during shutdown

src/plugins/simulator/emulated/simulatoremulatedmonitordialog.h

@@ -113,6 +113,9 @@ namespace BlackSimPlugin
             //! Test data for auto publishing
             void addAutoPublishTestData();
 
+            //! Can use the emulated simulator
+            bool canUseSimulator() const;
+
             QScopedPointer<Ui::CSimulatorEmulatedMonitorDialog> ui;
             CSimulatorEmulated *m_simulator = nullptr;
             QTimer m_uiUpdateTimer;