While using the new version (and it happened on the old version too), when I'm changing backgrounds in the store, it freezes on me occasionally. It happened to me tonight - it was frozen, no matter what I clicked on. About 3 minutes later, it came back for a second, then crashed in Windows ("proclaim has stopped working....etc"). This was after the program started syncing and wouldn't finish (I let it go for 8 minutes and it was still going and wouldn't allow me access to anything in the store while it said it was syncing). I checked my internet connection via speedtest.net at the same time - I had a 30Mb connection download and 5.2Mb upload connection, so I know the internet connection was working fine. I closed to program, skipped the sync that it tried to do as it closed and was forced to close the process in Task Manager, since it didn't close on its own. The log files after the crash are as follows:
5611.Proclaim.log
8666.ProclaimCrash.txt
6786.ProclaimError.log