I installed Lightroom 6, upgrading from 3.5. When my photos were transferred into 6, it shows I have a 'temporary' catalog of almost 3,000 photos that are not in folders. But I see most, if not all, actually are in folders. Can I delete this catalog without deleting the photos? Is there an easy way to check to see if all of the photos in this temporary catalog are actually in folders? I don't think it's a good idea to keep a catalog I don't need, want, or is it a problem?