If at any time you changed the resolution of that camera including adding or removing VPP, you'll wipe your motion zones. Not saying you did that, just putting it out there.I bit the bullet and did a full wipe and fresh reinstall of 22.214.171.124. Removing all the registry entries was like killing a hydra. I had to change the permissions for some of the children of the main key in order to delete them.
So far, it's working pretty smoothly, however my motion zones on one camera spontaneously disappeared. I can determine what's causing it, but it seems like it may happen after a trigger event.