Yeah, in the app it used to let you download the files, then you could insert them into the game folder manually. Doesn't seem to work in the app anymore. I'll give it a try from the website the way you said. Thanks.
And...now the game won't open. The app tells me it's running when I try to launch it, but it isn't showing up. It's not even appearing in Task Manager. Which is funny, since the base version worked fine until I placed the dlc rpa files in the game folder.