Pet stories freeze-ups

A few days ago my game started freezing up. It freezes up when a sim gives birth and when I go to the create a family screen. Sometimes it'll let my fully customize the sim, and then freeze when I try to save it, other times it'll freeze while I'm customizing it.

Now, it doesn't seem to react to any particular download, but it seems like something to do with downloads since it works fine without any downloads in it. I did the routine of making folder for save files etc, and individualy checking each file, sometimes it'll freeze when I try a certain file, and then a few minutes later it doesn't freeze with that file, it freezes with another one. I tried reinstalling, doesn't help. I've never had this problem, and I've had plenty of downloads. Is there anything else I can do?