After activating the theme you are going to be welcomed to the frontend with this encouragement:

Ahoy, [your name]!
Please create a custom menu and assign it to one of the available menu locations.

Bildschirmfoto-2013-08-27-um-08.47.27

Just follow the link from the message and do the logical thing. πŸ˜‰ You now have successfully completed basic configuration.