I wasn't able to uninstall. For some odd reason, neither my Windows 7 Control Panel, nor CCleaner list TOR among the programs that can be uninstalled.
However, I reinstalled without uninstalling, and that fixed it.
Yep the answer was in your question. Something had changed. You updated it and it quit working so the update was the obvious culprit. Had the same problem with my VPN one time. Had to uninstall and reinstall but it was still broken so I uninstalled and reinstalled the previous version which fixed it. Then I didn’t update it again until a newer version had come out which only took a few days. That tells me a lot of people had problems and reported it so they fixed it.