Quote d4yw41k3r (

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Only when I quit the program my screen is freezing (you still see the main menu but it wont disappear) and my MATE desktop background is gone, all windows leave their traces on the desktop... have to logoff and login.
I've seen Windows applications run in Wine mess up my desktop a few times (not with SE, though). In those cases I've worked around it by running the application within a virtual desktop. See the Wine FAQ.