Okay another dumb question. I installed the demo of Nattress' Big Box Of Tricks, and purchased the full version. Now how do I uninstall the demo? I can't find any related files on the HD anywhere (nor can I find the documentation for it that was opened when I first installed it).

try:

Hard Disk:Library:Application Support:Final Cut Pro System Support:Plugins: folder?

Thanks Martin, that did the trick :-)