Since your old computer is working, you have another approach that is open to you.
- On your old computer, run the Full Backup in the Organizer to an external drive. You may want to Reconnect any missing files and run the Repair command, even if no errors are found first.
- Now on your new computer, run the Restore command using the full backup on your external drive. Your tags etc will now be just as you left them on your old computer.
- At this point, you will have two copies of the photos on your new computer, those from the Restore command and the ones that were copied by the computer tech. Once you are comfortable that everything is as it was on your old computer, you can delete the copies made by the computer tech.
Personally, I find this approach to be more straight forward for the average user, since you are using the built-in commands of PSE's Organizer.
FWIW