Hello, I am having similar issues.
Problems started with "unknown exception" network errors popping up for uploading files. While working, I renamed a file and made a copy of it; the copy had the wrong design (one from previous versions, before renaming). Clicking delete on the copy produced no effect.
After reading on the forums about the "unkown exception" errors on mac, I attempted to sign out and in again. Clicking sign out renders the program unresponsive. Forcing it close and reopening it automatically signs me in again.
My network connection is stable, and I am on Windows 7.
I've got 5 log files for today's date in the specified folder, I uploaded the biggest 3 if those can help.