How to recover Kontrol s49 keyboard license?I sold a kontrol s49 keyboard to a friend, but for various reasons it doesn't work for him. I had to transfer the license to him, but now that he has returned the keyboard to me it seems that it is not possible for me to get the license back.Is there any way I can get it back?If I sell the keyboard again to a third person, could my friend transfer the license to them?I hope for your help, thank you very much.