Good evening. After having had a problem with a catalog, I managed to find a working backup. But the problem, if I have all my photos is that it no longer synchronizes. I have 16,631 photos that are in sync, but nothing is happening. I have tried the help offered by Adobe, but the problem persists. So I took the radical resolution to delete the entire Lightoorm library. To do this, you have to type a magic sentence (in French): 'Supprimer 16631 photos définitivement' But even that, it does not work !!!! The button remains grayed out. I don't know what to do to sync my photos, I can't even delete. Lightroom is starting to take my head seriously, too much of a gas factory. Well ... that was the rant. Can you help me sync / delete the library? Thanks for your help.