I've just found something really strange.... I was trying to consolidate all my user plugin settings from before Logic X. The location for Plugin settings for older versions of Logic is here: /Users/yourname/Library/Application Support/Logic/Plug-In Settings In Logic X it's here: /Users/yourname/Music/Audio Music Apps/Plug-In Settings Wait...that's not the strange part... If I save a plugin setting in Logic X or Logic 9, the new setting is saved into BOTH of these folders, instantly, at the same time !!!! Very interesting, but how the heck does that work?