Well hopefully this never happens.
However, if it does happen you can try clearing the "stateStore" which contains connection profiles, configuration and editor settings.
On Mac and Linux the statestore is ~/.dbKoda/stateStore.json.
On windows it is c:\Users\username\.dbKoda\stateStore.json
Warning: if you delete the stateStore file you will loose your connection profiles, editor layouts and any unsaved contents within editor windows.