PFF 3.1 Beta 2 - Stops Downloading After Crash

Possibly the weirdest error I've ever seen. I was closing PFF 3.1 beta 2 last night, and it crashed upon closing for no discernible reason. Since that crash, however, whenever I try to download something, I get an error that it can't find the "part" file in the Temp directory on my local hard drive. I cleaned that out just in case, but that didn't fix anything. In fact, I was surprised to see it was trying to use my local harddrive.

Any thoughts on fixes short of uninstall and reinstall? Known bug?