For all users from XP store, the steps to transfer your licence to ORBX are:
1. find your global forests serial number OR the invoice number
( order number) at your xp store account ( or in the email received after the purchase)
2. go to https://orbxdirect.com,sign into your account and then go to https://orbxdirect.com/redeem
paste you key ( serial number OR invoice-order number).
A message should appear, confirming the successful redeeming.
3. go to your account page at orbxdirect.
Global forests should appear as purchased product ready to download.
please read this post for further instructions on how to update for the 1st time.
Orbx proposal is to download Global Forests for xp11 which I have already.