Several days ago, I upgraded to Adobe Photoshop CC 2015. It did not work very well; I could not set it as the Default for jpg files. Two hours on Chat with a "technical" support person revealed that the installation did not write the correct string into the registry. While I have extensive experience with OS details, a lot of your customers probably don't (they are photographers and graphic artists, etc.) I suggest that you fix the problem in the installation scripts. The support person kept blaming everyone for the problem. Install programs should write correct registry entries, the user is required to give the install program permission to make changes to the computer.