Probably it is a bug: When I do some changes in Construction Mode and I do something wrong I do some "Undos". When it goes above the first edit the 3D Simulator crashes.
Could you explain exactly which edits you make when the simulator crashes? I have tried moving some objects int eh 25th anniversary stage, pressing undo 3 or 4 time then moving objects again and this seems to work fine.
After showing a friend a light show on daslight with the 3D sim, he asked could just the simulator be used with other lighting software like light factory ?