Apologies for the delay. I have an integrated Intel graphics card and also an AMD Radeon HD 6870. Two of my monitors are on the AMD card and one is on the Intel card. After reading your response, I disconnected the monitor on the Intel card and the game now works, so it appears to be caused by ...

Thanks for the link, although I've already tried all of those steps without success. I also tried decreasing video-memory-usage further to low but it didn't make a difference.

I'm experiencing a crash on start-up on Windows 8.1 with all Windows updates installed. I realize this is from version 0.12.20 but I checked the release notes for 0.12.21 and a bug fix for this kind of issue wasn't present there. I see that the proximate cause of the exception appears to be the ...