The Windows compatibility mode did it for me I think. I'm running AutoVer with compatibility mode "Windows 8" and all former watchers are there again and working.
If you click with the right mouse button on the AutoVer start file you could choose "Properties" and "Compatibility" and then choose "Compatibility mode: Windows 8" (or something like that, couldn't check because of a german version).
I got Windows 10 Pro but I hope any other version will do it, too.
Dispite AutoVer is not supported any longer it is still a great software! Thanks for it! But after it didn't work for me under Win 10 I was so frustrated. I searched for alternatives for hours. Didn't find nothing for my special needs and just decided to do the hard way configuring an (for me) over-complicated versioning system like Git/CVS (I ever wanted to - but time ...) as I thought "Gosh, compatibility mode could do the trick at least" doing the dishes.