Upload & Sell: On
Highlight one of your files you want to open. Press command I, a window with info on the file will open. About half way down the info window there will be pull down menu that says open with. Change the open with to Photoshop CS6 and click the change all button below it. Now double click your file and it should open in CS6.
Thanks, but been there, done that. It still does not work.