[samw97]

I think I found the problem.

A copy of the Activities key was left in HKEY_USERS\S-...\SOFTWARE\Microsoft\Windows\CurrentVersion\Medi a Center\Extensibility\Categories\Services

When I deleted the key it removed the tile.

One other very minor bug... When I make a change to a custom strip, the save button does not become active. Only when I touch something else, does the save button become active.