Ch. 2 game file (Mac) opens in the dock but game doesn't start (no main menu window, etc.). On a couple of occazsions, just in case I have a slow computer, I've waited up to four hours for it to kick in, unsuccessfully. I've re-downloaded the zip file and re-extracted the game, in case the original download or extraction process was wonky. That didn't work either. (The revamped Ch. 1 file works fine, btw.)