Quote Originally Posted by Aeyis View Post
Sounds quite clear to me. One copy for each platform. If you want a CE edition, only one (total) of those needed per account.
I think this is the clearest way to express it. You will need to purchase a copy of Heavensward for any platform you wish to play it on. Don't think of it as "where it's installed" -- because you need to have a registration key added for each platform you wish to play on. If you currently play A Realm Reborn on PC and PS4, you will need to buy Heavensward for both PC and PS4 if you want to play it on both. If you buy it only on PC, and log off in a new area and then attempt to play it on PS4, you will be unable to log in.