I am bumping this thread so that one of the other mods, admins, elites, or any forum member familiar with Stella can take a look at the information DGringo has provided to see if there are any setting options in Stella that might resolve the issue he is having with the screen flashing on return to GameEx from Stella. Thanks! EDIT: I do not have Stella installed at present but did notice that the renderer is set to OpenGL. Is there a DirectDraw option? Could the transition from OpenGL to DirectDraw contribute to the flashing issue?