I had many photos and collections created in lightroom - now I only get some. They are in my storage - but for some reason they do not show up in the library - where are they and what causes this?
Here's a guess ... you opened (accidentally) a different catalog, try using File->Open Recent and see if any of those catalogs are the one you want
Thanks, I stumbled onto the solution by opening an earlier catalog I had saved (or backed up). Not sure how I ever "opened" the erroneous catalog - or how I was able to open the correct one - but I did.