WC 4 ran fine the first time I opened it (Windows 7 64 bit). The next time I tried to run it there was a brief message above the task bar to the effect that the color scheme was "incompatible" and was being changed to "Windows 7 basic." The screen was black except for a "close program" dialog box. I changed compatibility to Windows 95 (from 95/ME) and it ran fine, once. Now I get the same crash and message every time I run it. In the first run I changed options to SVGA with triple buffering, but did not change any options in the second successful run. Of course, now I can't change any options now. Any ideas?