The only response from Umberto was essentially to restart your computer.
This is the correct reply, if you only get the "bad 3rd party program" error message, and NOTHING ELSE.
If you ALSO got the K32Enumprocess, which is ANOTHER and ADDITIONAL message which appears AFTER that one, which only very few users on Vista reported, my reply was again the correct one, saying this was in fact a problem with a call which is not supported in Vista anymore.
But as I've said, we fixed this, and are not using this call in the current version of the Addon Manager .DLL, the one which has been online since Feb 9th, which everybody will automatically get, by installing anything from FSDT after that date.
However, since (as I also said), nobody at FSDT ever uses Vista anymore, since it's basically an unsupported OS right now (even Chrome and Gmail won't be support it shortly ), it's still possible there might be other remaining issues with it we are not aware. The K32Enumprocess problem was discovered after a session with an user using Vista so, if you still have this error, I suggest having a Teamviewer session, so I could check it.