Cubase 9 on second computer

I upgraded from Cubase 5 to 9 and when I bring the dongle to my second computer no licenses are found in the elicenser. When I put in the activation code for the upgrade, it says “no license found that can be upgraded”. I would even be satisfied to continue to use Cubase 5 on this second computer (my teaching job), but there is nothing. How can I fix this?

Install the latest eLicenser Control Center on your old computer:
http://www.elicenser.net/