what do you mean? if you alrady bought it the download button appears at the very top.
or check in your library.
I mean that there's no more download button on my end with only the Buy Now Button available.
I uninstalled the game a while ago to wait for the new update and when I saw the update I tried to re-download the game. Only for the newest version to be unavailable and the only button I can use being the Buy Now Button.