No russian aircraft available when hosting a cooperative server

[martinistripes]

I'm trying to host a coop game however when I create the server all the russian aircraft are locked. When I try to select one I get #10003: This aircraft is not available for your account (or has been modified).

 

I've never installed any mods, and my friend has the same thing. Can we only play as German side in coop?

[martinistripes]

Nevermmind, just discovered I need to download coop missions first with the aircraft I want to fly incorporated into them.