Ok, Tesla Effect worked like a charm until yesterday. Now it always stars in windowed mode and to make matters worse, the visible screen is only the centre - so everything that normally was in top, bottom, left and right part of the screen, is invisible. There is no way to make any changes in options, or anything like that. The re-installation didn't help. I moved the Settings.db from the profile folder, but that also didn't change a thing. Anyone has idea what might be wrong?

Ok, I found a solution via: (www).gog.com/forum/tex_murphy_series/broken_resolution but you need to also manually change the resolution in the registry (it seams that there is some sort of confusion between windows and game)