I bought logic studio 8 used, how can I register it to my name?, I bought logic studio 8 used, how can I register it to my name?

I bought this Logic studio 8 from craigs list, the guy who sold it to me said he never registered the program but I asume he installed it in his mac which he also said that it crashed and that was the reason to get rid of logic since he is using a pc now.

He gave me the box with the serial numbers and prod ID as well as the manuals and dvds which I took and installed in my mac laptop so my question is, can I register this software to my name and how does this works?

I know you can only install it in a desktop and a laptop belonging to only one owner.