#4 screen resolution

[pi82]

accidentially I clicked on a too high resolution for my laptop. Now I can start eclipse.exe BUT it comes up with "the resolution and/or screen depth are not supported by your hardware". Then I click on "ok" and the program opens. But there is no menu to change that. Just the black screen with the mouse.
I re-unpacked the program, but it seems this information is stored somewhere else?!
Thanks for help!