1. To rename a catalog:
  2. Go to Catalog>Manage Catalogs...
  3. Select the triangle next to the catalog to show more options
  4. Select the Rename button

Your catalog will be renamed, and you can continue working.

If you rename catalogs outside Photo Mechanic Plus by renaming the folder containing the database, this will cause errors. If you've already renamed your catalog folder, use the Locate Existing Catalog button to restore the catalog.