Windows 11 - iCloud Passwords app crashes after putting in Windows Hello code

Hello,

I have iCloud for Windows on an 11 Pro machine. iCloud Passwords works fine in Edge and Firefox.

However, the standalone app won't open. I double click it, put in my Windows Hello code, the arrow spins and then after a few seconds the app just fades away (quickly). I've done al of hte on off intsall uninstall kabuki with no change.

It's this problem (but this forum closed without solution). iCloud Passwords app crash on Windows 11 - Apple Community

Any fresh ideas?

Thanks

Andrew