Ok, I'm not perfect ;(. I've been bashing myself all morning over a mistake I made in v3.50 and v3.51 beta.
First, this applies ONLY to the FREE build. Registered users are not affected.
During changes to the licensing system, a portion of the governor wasn't updated, causing it to actually expire after 7 days. Unfortunately, due to the way it terminates, the user doesn't even see a log entry, so is left not knowing what happened. Some users may not even notice that it isn't working.
This bad build was online for 3 days, and about 25% of the active user base probably upgraded.
I have now fixed this problem in v3.52, so please upgrade now.
I apologize for any troubles this has caused. The only bright spot is that by the time the user has had v3.50 installed for 7 days, it will also be time for an update check ;).