To the best of my knowledge I'm not, nothing that I've installed or used in a very long time.
I've looked in "Program Files" and "Program Files (x86) and I don't see anything out of the ordinary.
Just to confirm, I went back in time just prior to installing Fences 5 using Acronis Cyber Protect (backup/restore software) and I can verify that right clicking did indeed work just prior to installing v5 of fences. This is a new issue to the best of my knowledge.
The only other thing that I know of that might affect the program is the new update that was forced upon me last night at the last moment for Windows 11 Pro. Thankfully I was able to make a backup of my system just prior to the update.