I needs HELP! I had to reinstall Lightroom 4. It installed fine and updated to 4.4 as it should of. My problem is that I do not have any photos in it. I have had Lightroom 1 and Lightroom 2 so I have at least three libraries. So the question is how do I get them to show up?
Use File->Open Catalog and point to your previous catalog file(s) (their name ends with .LRCAT)
Use File->Import from Another Catalog and point to each of your previous catalog files to merge them all into one catalog