You shouldn't have to call him just to transfer a license. As long as you have access to the same email address that was used to purchase the software then you can transfer to a new system-id.

Every now and then one of my Keyclones will pop up and say that the license expired because my system-id changed. I think it is because I take this computer to another location which is on a different subnet. Every time I bring it back it says this. In Keyclone, if you go to "about" at the top, there is a "get license" button. You need to have the newest version (v1.9i) installed since this hasn't always been part of the application. You will receive an email with a weblink, follow it and it will ask you to choose which system-id the license should transfer to. Once you click the "ok" button or whatever, go back to Keyclone and click on "re-check" and it will change to status "active".

-Kuro