GEK,
Lots of people, lots of similar problems. For something like this, a search definitely comes in handy. Just need to know what keywords you might need.
I searched for last 2 years for +Uninstall +registry and found a thread to which I'd posted before.
Here's the link.
[Link: remotecentral.com]Just make sure you search for "ProntoProEdit NG" instead of "ProntoEdit NG" in the Registry.
Post back if this does not work for you. :)