Can I register my JReviews license key to a different site
From JReviews Documentation
Yes, to move the license you will need to reissue it. To do this first log in to the Client Area.
Click on View Your Orders link on the left menu, click on the order for the license you want to move and then click on the "View & Download" button.
On the next page you'll find the "Reissue License" button.
Once the license is reissued, go to to the new domain and submit the license number in the JReviews administration.