@JeromeLeventhal 

The unexpected behavior you have experienced regarding Windows 11 update and Prior year programs has been reported and currently being researched. 

If you're able to send us the log files it'll help us find the root cause. Open up your ProSeries TY21 application, and click help, then Send Logs. This will create a log file on your desktop. Please E-Mail this log file to proseries_engineering@intuit.com so we may continue to investigate this unexpected behavior. 

Closing this discussion, follow up on this thread for updates on what might be related: Windows 11 updates 2021 not saving