Still unable to get Clipboard History to work again

Clipboard History suddenly stopped working.

I have repeatedly tried the fixes on this site without success. What usually happens now when clicking WinKey V is that after a delay a blank Window appears, so presumably the History has been lost. Often it quickly disappears but if it hangs around long enough, new items which I copy do not appear (except they do, in other third party Clipboard apps which fortunately I kept in reserve). Once only I have received the popup asking me to copy items to test it, also unsuccessfully.

I am not sure about the reg edit fix. In the Folder where it downloads, when I click it there is no result. Am I using it right? ----- "

4.

Save the .reg file to your desktop." And then what?

Although I have other good Clipboard apps the new native one had some useful features, not least the sync to other devices, so I would like to get them back.

Try restarting explorer.exe in Task manager?

Thanks for the suggestion but as I expected it did not make any difference

(I use Restart Explorer.exe quite often). So I still have not got Clipboard History back. Sometimes I get the popup saying a Clip has been added, but the Window remains blank.