Follow these steps:

1. On a machine that does have Internet access, install and register screen-scraper.
2. Install screen-scraper on the machine that isn't connected to the Internet, if necessary.
3. With both instances of screen-scraper closed (i.e., not running the workbench, server, or in command line mode), copy all files beginning with "ss" from the "resourcedb" folder of the licensed instance of screen-scraper on top of the corresponding files of the unlicensed instance of screen-scraper, overwriting them.

Note that in doing this you'll be copying the entire screen-scraper database from one machine to another, so along with the licensing information it will also copy any scraping sessions, proxy sessions, and scripts. This will also mean overwriting any of those objects found on the unlicnesed instance. Before copying the database over, care should be taken to export any objects from the unlicensed instance that you'd like to retain.