now another problem
I managed to get the game started by tweaking the graphic options (i.e. screen resolution) and setting full screen off. Now I have a different problem that happens consistently regardless of screen resolution. When the game window is minimized then restored, the game screen becomes entirely blank. As far as I can tell it's still functional, as I can hear sound effects. I doubt I would be so lucky to accidentally stumble onto the correct graphic tweaks to fix this problem this time. Any suggestion?