I have the CC Photographers membership. My CC applications are showing 'Photoshop CC' and 'Photoshop CC 2014' being installed. What is the difference in these two apps and do I need to uninstall one? Why are both installed on my Mac?
Flash went away in PS CC 2014, replaced by HTML5 for Extensions, so Adobe decided to let PS CC 2014 install alongside PS CC 14 for users who need to use their old extensions while they wait for the extension developers to rewrite things in HTML5 or they find alternatives.
See this article along with the few linked at the bottom, especially the FAQ and Spring Cleaning: