The Clean Reinstall procedure I found elsewhere on this forum (after I'd posted) completely solved the issue on both  my machines. Close Lightroom Restart the computer Use the Adobe Creative Cloud App to uninstall Lightroom Restart the computer Install Lightroom via the Creative Cloud App without launching any other programs. Restart the computer Launch Lightroom Wait 5 minutes ... View more

This morning I updated to v13.0.1 and now LrC crashes as soon as I open the app. (Immediately after the update completed I tried to load LrC and it got through "initializing Lightrom Classic section and then crashed.) After multipl attempts with th same result I tried restarting my system, then logged out out of Creative Cloud account and back on, to no avail. I've run through all the options on the "fix crash issues for Creative Cloud apps" page. My desktop machine is a 2015 iMac running Monterey 12.6.9. Photoshop loads and runs without difficulty as does Bridge. I even tried to uninstall LrC but that proc just hangs and spins its wheels. Coincidentally, yesterday I loaded 13.0.1 on my laptop (2019 MacBook Pro running Ventura 13.4.1) and LrC won't even load. When I click on the app icon with Force Quit active I see a brief flash as if it's tried to open, but it immediately disappears and does not execute. ... View more

Just completed the update to LR 5.3 and that solved all the problems.  Back to work. ... View more

I have started having the same problems with both .MOV and .AVI files.  Mac Pro, OX X 10.9, Lightroom 5.2. This has to resolve soon - I have a large video project to prepare for a client and suddenly I am having to develop a work-around to even look at the files prior to editing in Final Cut.  Grrrrrr.  Telling the client, 'sorry, the Adobe product that I relied on to do initial prep is no longer reliable' just doesn't cut it - they don't care, they want their product! ... View more