restore not working

[snowman1]

I am trying to migrate to a new laptop. I am following the guidance in the PSU Maintenance PDF.
On the old laptop I have compacted the databases (thumb and catalog) and made a backup.
On the new laptop I have installed PSU (the same version, which is to say the terminal V6 version, 6.7.2.4229 64bit). This has installed ok.
On the new laptop I opened PSU and tried to restore from the backups I made on the old laptop. The restore finished very quickly - about 2 seconds. It appears to finish normally with a message "Restored. The application will now terminate itself. Please restart the application. Catalog restore finished". But when I restart PSU the catalog is still empty. Am I doing something wrong?

[Hert]

You can manually copy over the photosupreme.cat.db and photosupreme.thumbs.db files from the backup to the catalog folder.

[snowman1]

That worked, thanks.
Is that what import does (or in this case didn't do!), an OS-level file copy of the catalog? Just curious.