With Fences 4 under Win11, I do not see a Lock Fences option when clicking on a fence or on the desktop.
Was mistaken earlier, I had one of my installs mixed up. It's three Fences 4 installs, one under Win11 and two under Win10; and an install of Fences 3 under Win10.
That is with both the Win11 right click and classic right click menu.
I'll try running the purge tool under Win11, though it had no effect with Fences 4 under Win 10 exhibiting same issue.