Rhino 6 autosave not working since recent windows 10 update

since a recent windows 10 update Rhino 6 Autosav does not seem to work.
It is set to save every 20 minutes but no file saved in either the desginated autosave folder (I use a folder not on the C drive (D:\00000-AUTOSAV RHINO 6 2022) in case I get a system crash that trashes the system). Nor is it in the recycle bin.
I have seen no files since windows updated on 28th January
.NET Framework 3.5 and 4.8 on 28th January KB5008876
and KB5008212

If I type “autosave” in the command line it autosaves to the root directiryof drive D
Any ideas on what Autosave is not working ??

Logikman

as a test, if you set it back to the default folder does it work?