Hi 😊 Posting here with a possible solution.
So I've encountered the problem today after installing Fences 6 over my Fences 5 installation. Each time I opened the settings, it said it found the version 6 files instead of version 5 ones... so here's how you might be able to fix it (at least I was):
Before we begin - you might want to backup the edited file and also, do it at your own risk (which I guess is minimal, though).
First, make sure that the Fences config window is closed. Then open Notepad as an Administrator and from there, open C:\Program Files (x86)\Stardock\Fences\FencesVersion.txt and change the version number to whatever is the version number it says in the error that you have (for example I had something like 5.5.1.0 - can't remember exact numbers - and had to replace it with 6.4.6.1). Then just save the txt file and the error should be gone.
I guess there can be different reasons for the alert to appear, but when it appears after an upgrade, it is possible that the installer just forgot to update the mentioned text file.
Hope it helps. Also, I hope people from Stardock don't mind such edits - it's a minor bug and I feel it's unnecessary to reinstall or purge the whole thing because of it 😊
- Ellie