So to clarify this you need to delete the folder that you select, also when your in the file explorer/ what ever your system is running such as linux whatever the variation it is, you can see files that are still in the game and arent supposed to be there since you deleted them, you can get rid of them in there to clean up a little more as well. (There will most likly be older files that you imported and you may want to clean up since they where either deleted or just not wanted).