auto-release is a bit of a problem insofar as Remote Buddy would have 
to either run with root priviledges (which would be a bad idea) or 
support for supportive devices has to be turned on in System Prefs 
(so this wouldn't work out of the box), so I'm not sure whether I'll 
add that one in particular.

I'll add an action though, that will allow you to release all of the 
modifiers Remote Buddy holds at once.

Best regards, 
Felix