Also for what it’s worth - and a good place to end this thread (or merge parts) is here:
Same exact issue I had but seemingly only related to the 64-bit thing though through that long thread there’s a lot of mention of Steam downloads too. I don’t know if they’re correlated or not. But they are putting out updates so fast this topic is already outdated.
Edit: Actually the original poster’s issue is not what I had but there were several replies in that long thread which did fit the same problem I had on trying to save and it freezing / crashing at that point. I’d say it wasn’t related to the Humble Bundle to Steam issue at all except that’s when the crashing appeared for me - maybe it was coincidental. If I downloaded the Steam version only, no problem.