App windows starts on external screen even when disconnected
Windows 10 on a laptop.
Connect an external screen.
Move the window to the secondary screen.
Disconnect the external screen.
Problem: Geogebra tries to start on the external screen. The Geogebra window is out of reach.
Reconnect the external screen. Now the Geogebra window appears on the secondary screen.
Disconnect the external screen. Now the Geogebra window comes back to your laptop screen.
Close Geogebra. Next time you start Geogebra without external screen, the window will show on your laptop screen.