Figured out a fix for this, if you don't have the older version installed. As suggested here: How to Remove Duplicates & Customize the “Open With” Menu in Mac OS X « Mac Tips :: Gadget Hacks I believe this is probably Adobe's fault because they've been retarded for years rather than MacOS, but, anyway... The "Open With" apps are made up from a file which needs to be reset, as suggested on the post you can do this by doing the following opening terminal and running the following line: /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -r -domain local -domain system -domain user; killall Finder After running this the older missing version of photoshop disappeared from the menu.
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