Lightroom froze and shut down in the middle of editing today. I have tried multiple times to restart the program, restart the computer, check for updates, etc., but the program/app is no longer opening at all. Sometimes I will get the opening dialogue box as though it is going to start, but then nothing happens. I have tried on a separate computer and am having the same issue. When I look in my Creative Cloud account, it says my Lightroom app is up to date. Any ideas?