Ooooooookkkkkaaaaayyyyyy... But the short answer, which is not addressed there, is that when you hit install it asks you where you want the game to be installed. There are apparently no common behaviours for these clients. Everybody does it differently. In most of these clients I've seen, there is a settings to direct all games to a Library folder somewhere. But this client asks for each game where you want it. So there's that.
Thanks a ton.