TB no longer getting new messages
I posted about this problem back on 9/12/21.
[[TB Stops Getting New Messages|https://support.mozilla.org/en-US/questions/1350432]]
Now it is worse. Back then I discovered that if I added another view, TB would then get all the new messages for all accounts. By "adding a new view" I mean I normally run with Unified Folders. To get TB to download new messages I could "Add folders all" and the status bar would show TB was logging in to my accounts and downloading new messages. If both Unified and All folders were being viewed, I could just remove the All folders view and the downloads would execute. So that is the way I have been operating for 20 months. But now even that doesn't work! Nothing I do will cause TB to get new messages. To make things worse, if I do About Thunderbird it shows 102.9.1 (32 bit) but it also shows "Checking for updates" and that never completes. I just get the spinning circle for hours.
How can I restore the TB functionality on this Windows 8 tablet?