you should have an email with a link to the download
scratch that i read it wrong, i just downloaded the app and i managed to download it fine.. so its either being fixed or something is wrong on your end maby ?
Since it's a seperate download file, you'll probably need to uninstall any previous versions of the game if you hadn't done so already. If it still downloads another version then you might have to do it manually with the browser. Correct me but I believe a popup should appear giving you an option to choose which file to download.