I am unable to delete a catalog; I get a message "catalog in use by another program". Doing a search with Windows 7 doesn't come up with any catalogs. Where would this other program be?
How are you trying to delete this catalog? Does PSE have this catalog in use when you try to delete it?
Suggestion ... don't bother deleting the catalog; just ignore it.
Thank you, I'll ignore it
It's probably the Watch Folders that has a lock on the catalog. Either disable Watch Folders in the Organizer (File...Watch Folder) or use Windows' Services to stop the "Adobe Active File Monitor" service.