That wouldn't make sense.You want to upgrade to Xenporta 2? Then you need to buy Xenporta again. But I think the branding removal, if you bought that, transfers.
My website using xenporta for xenforo v1, if I upgrade my site to xenforo v2, some part of my website becomes useless.
So it forces me to stay under xenforo v. 1.
If that's the case, it's a shame.
Thank you anyway for your answer.