After installing a new version of the Adobe packages, can be Photoshop, Indesing, Illustrator, etc., there is a problem with opening its associated files, in fact even with the right mouse button "Open with" we not find the new application and you are unable to associate.
The only way to correct this problem is to follow the steps followed. This example are for Photoshop application:
Go to the following registry key: HKEY_CLASSES_ROOT\Applications\Photoshop.exe\shell\open\command
change the value of (Default) from "C:\Program Files\Adobe\Adobe Photoshop CS5 (64 Bit)\Photoshop.exe" "%1"
to this "C:\Program Files\Adobe\Adobe Photoshop CS6 (64 Bit)\Photoshop.exe" "%1"
of course, these steps are also valid for later versions, paying attention to the new nomenclature.
Now if you click with the right mouse button on "Open with" find the correct program.