Reply To: [ID] [Finder] Change the Default Application a File Opens With

Yes, frustrating – no, don’t know why.
My workaround is to have a permanent Dock icon for the desired version of the program, and drag-and-drop the file onto the Dock icon.
Slightly more accurate than right-click / open with / select the right one from CC17/CC14/CC15/CS3/CS4/CS5/CS6 (yes, that’s the order they come up in for me; and yes, I’ve still got a client who won’t upgrade from CS3).

hope that helps,
Chris.