Elements Organizer 19 backup "drive does not contain a valid backup"
Elements 2019 installed on old and new Mac, current OS installed. Did optimize then full catalog backup from old Mac to removable drive. Message said backup complete. Unmounted and moved drive to new Mac, selected the location of backup just completed, tried to restore backup (tried both with and without selecting restore original file structure) and get the message "drive does not contain a valid backup." Really no idea what to do next.
