I recently got creative cloud and installed LR and PS. I have been using LR which is working fine, but when I just tried to use PS it wont even open it up. It says, could not complete your request the internal file signature is incorrect. There is a PS update and I've tried to do it a few times and says it wasn't able to update. Not sure what to do and if it will affect the other things I downloaded if I have to reinstall.