Hey JSV. I wouldn't recommend uninstalling the free version ; when you next update Pro, it should remove the Free version from appearing as installed. Let me know if it doesn't. You're on XP, 32bit right?
Regarding the locked setting, that is interesting. I'll have our guys take a look at that. If you turn locking back on, does the problem resume? If so, does it go back up immediatly, or only after something happens (such as mouseovering a specific fence, or triggering quickhide, etc)
Thanks...