I just returned from a very expensive trip to Alaska, and just tried opening my NEF images on my Windows PC, but receive this error message: "Could not complete your request because it is not the right kind of document." Photoshop CC worked perfectly fine on other NEF files until just now. It is NOT a case of corrupted files - I've tried opening older NEF files saved previously and receive the same error message. Further, when I try viewing the files on my iPad, I have no problem - they display fine. What the heck is going on with Photoshop CC?