Dngallagher wrote:
If you delete or rename the lock file, Lightroom will continue to default to your new catalog on open, so you will need to tell Lightroom to open your old catalog file - go to Lightroom/File/Open Catalog or Lightroom/File/Open Recent and select your old catalog, from then on it will remember.
Thanks to all. Your information was correct. The problem is solved.
I lost some Develop settings, but not too much. :thumbup: