I seem to have the same problem -- running XP sp3
Installed the trial version with a view to buy -- I like the sound of what it "should" do.
The install moved all my icons into fences, but when I try to move an icon or use
Fences in any way it gives a registration box.
I click trial version
Then it seems to try to verify something, and ends up with the error
"Problem unlocking fences"
Reboot does not help
Is there a fix ?