Application window does not show up on program start - When I start MatCalc, I don't see the main window popping up although the program seems to be running.
Some windows have disappeared - When running MatCalc and opening the 'buffer states' window or the 'console', they don't appear on my screen.
When MatCalc is closed, the last window positions are saved for the next startup. When you use two computer screens, it might happen that you move some popup windows, or even the entire main window, to a secondary screen. If you open MatCalc without the secondary screen connected, MatCalc will still try to display the windows on the lattest positions. In this case, the secondary display.
Reset the saved positions of the MatCalc windows.