License transfer for TheSkyX Professional

Hello,

I purchased a copy  of TheSkyX Professional from a user who has upgraded to the full Paramount software suite and does not need the separate copy of the TheSkyX Professional any longer. I understand that he needs to transfer the license to me and I was wondering if you could let me know how to proceed. 

I look forward to getting acquainted with TheSkyX!

Best,

Luca