Going forward, you might want to get a cool utility like Hazel (noodlesoft), which among other things, will help you remove remnants of files on your Mac when you delete an app. When I have deleted an old FMP version, I just go to the applications folder and delete the FMP app file. Then Hazel kicks in and offers to remove all the pieces in various other places.
You can download a free tool like "EasyFind" which will search your entire mac for remnants of a program -- even places you won't find using Spotlight-enabled searches.
HOPE THIS HELPS.