I can't play the heavensward add-on

[Fossil924]

I purchased the steam version because after I had previously bought it @ SE store only they never sent codes and I couldn't download the game and had the money credited to my account. I haven't logged in since that day on the PC until today and it keeps telling me Heavensward isn't installed which is wrong the day installed it and logged into my main and set up some macros now it says I can't use him because it's not installed?? Any ideas I could log in that day but not today.BTW I logged into my main character after install and a week later I couldn't please explain that the heavensward was available to play a week later it wasn't and you know that the update was inbetween right?