New Error Message - CLIP licence device does not match

Had FS2020 installed and working on a PC. That PC started having major problems so I decided to buy a new PC. I uninstalled FS2020 off the old PC before the new PC arrived.

Now I’ve got the new PC and MSFS 2020 won’t even run. I get an error “Clip License Device ID Does Not Match The ID In The Bound Device List”. Here’s what I’ve done so far to try to fix it, to no avail…

Windows Update says fully up to date

SFC /Scannow reports no problems. It WAS reporting a problem but a run of dsim restore health fixed that

Windows 11 is activated. I had problems with the activation but Microsoft support helped me fix it

Signed out of both the MS Store app and the Xbox App and signed back in

Made sure all the apps listed in the MS Store were up to date

I cannot find any other solutions to this on the internet. Anyone have any ideas?