Why does the game still ask me to buy the full version even though I bought and downloaded it?
go to the top of the page and you should see a download button click that or you can also go to your library found by going to the top of the page under your username (click your user name and there will be a drop down menu that appears and the first one is "My Library" click that and it will take you to a page with all the games you downloaded "Things you own", things your rated, and your collections).