HOW TO UNINSTALL LOGIC PRO 9 SUCCESSFULLY - IN UNDER A MINUTE!
Don't drive yourself nuts trying to find untold files and deleting them.
Simply go to http://www.macupdate.com/app/mac/30940/amnesia and download this app. It's got a free 15 day trial with no sign up necessary.
I used this to uninstall logic pro 9.
Once you've downloaded the software click on the applications tab and it will find all your apps.
Then click on logic pro app in the list and click the button and it will uninstall logic pro and all related files, you only have to select logic pro 9. You don't have to worry about all the other related files, it will find them and deal with them.
It took about a minute to uninstall the whole kaboodle and I ran a fresh install of logic pro 9 from the apple app store without any problem.
May the force be with you!