For xp store users:
After transfering lisence from xp store, Global Forests will not appear as "installed" at central, although exists in the account after redeeming. After the first update , central will list global forests as an "installed" product.)
The orbx central installer examines the X-Plane's "Custom Scenery" folder , finds the "Global_Forests_v2" folder if exists and then scans all files inside. It will delete, add, update everything automatically.
So no action is needed from the user.