Windows 10 client doesn't upgrade anymore

Dear all,

I’m stuck since weeks at Version 2.6.1stable-Win64 (build 20191105) Built from Git revision [5adbc0] as my Windows client doesn’t upgrade anymore!

It correctly warns about the new 2.6.2 release, opens the web page to download it, installation runs through with no issue (uninstalls 2.6.1, installs 2.6.2), however when I reboot the machine, I still get the message about the new version: 2.6.1 is still the active one!

Any clue on this? How can I force the client into upgrading?

Thanks in advance for any help!