Netkar pro licence


since some years (3 i think) netKar i buy a netKar license.
i lost the computer files.
now I have a logitech g27 and I would like to play again.
a question,can i recover the license??, do not remember the details.
and the other is if can not retrieve a license could give me one ??
thanks to all and sorry for my bad english,i am from uruguay