A file with a .PSA extension is most probably a catalog file from an older version of Elements (up to PSE5). To be able to use it with a newer version (including PSE12), you'll have to convert the catalog to the new format. In the organizer, open the 'File' menu, select the catalog manager (shift Ctrl C) and click the convert button, browse to the .psa file. Your catalog will be converted to the new format.
↧