How to add Warhammer Forge units?

[Elrowen]

Heya all!
I can't seem to find how to add Warhammer Forge models (nor forgeworld models for 40k either). I've tried searching for data files to download, but can't seem to find it.
I have the settings for allowing both forge world models and warhammer forge, but I can't seem to add them to my roster.

And with models like the Rogue Idol and new Squig Gobba from warhammer forge... well, with models like that, I just can't 'not' have it in my army!

Any help on this would be extremely appreciated!