Bell-47G XP11, I would like to know

Good afternoon, gentlemen…

Having bought the Bell 47G some time ago, for MSFS, and facing its release for X-Plane 11 (which I’ve already downloaded from the website), I ask if I will have to buy it again, or can I install it on XP after you guys send me a new valid serial? Otherwise, if I buy it again, will I have a discount?