Sure as the sun is warm, it crashed again - twice. First time I was very lucky because I had just saved, and just clicked the Save button again to see the gap between the last few saves. Next time I lost half an hour of playtime (crashed when I attempted to save, before the actual saving), including getting chickens from a trader and frantically building a pen before they die. This last time there oddly wasn't an error message, and the game is still open, although unresponsive.
I actually cleared the registry yesterday. Had another look right now and there were some modIndex lines (in HKEY_USER), although everything looks in order, with a count from 0 to 11. I deleted them, though.
So... despite playing without any mods, the game still crashes. Did I tell you this was frustrating?
With decor, do you mean the below? I've used Windows XP so far because it's the default, but I can try Win 7 of course, and hope that
somehow helps. Had a slight hope it was the mods that did it (despite it running fine with the same mods before, in Windows), but when the clean game crashes too, I'm out of ideas.