Buying separately KI3 for Xbox One and windows 10?

I own Killer instinct 3 season 2 for xbox one, Can I play this season 2 at windows 10 ?
Or do I have to buy this game for the second time ?

If you own one version already, you have the other version free. :slight_smile:

Thanks for reply, now I got my all characters open. :slight_smile: