HELP! On a PC. Creative Cloud just upgraded my Lightroom CC to whatever the latest version is, and now Lightroom is broke. Lightroom starts and the program shows up enough to see pictures, Library, Develop, etc but never responds to any commands. Windows Task MGR shows Lightroom as not responding. Have rebooted. Terrible, Terrible! I have so many weddings under edit right now with other projects - that I cannot work on. This is a major killer problem.