Can't Install on PC

Hi, I just purchased Halo Wars 2: Complete Edition through the Microsoft store last night, but when I go to my library, where it shows up under My Games, there is no way to download and install the product. It has a listing, but now install button. It just shows the button to buy it again, which I’d very much like to not do. I was under the impression I’d be able to play this on PC so I’m rather confused. Any help would be appreciated.