I purchased through the SEGA store but have the game running through Steam.
EDIT - I think I just fixed it. SEGA sent a multiplayer code so I re-activated the game with that and it's downloading something.
For the life of me I can't seem to find this or the free one, for some reason the free one isn't listed in tools yet :/
Can someone break down where to find the in-game one please? Where is the in-game store?