gridmarket theme marketpress

Just finally getting started with setting up gridmarket and marketpress. I'm pretty sure there is no user manual available based on searching the community threads here so I'm going to ask probably a lot of questions as to set up with in the backend.
So I have framemarket and gridmarket installed and enabled in the overall network dashboard themes. In my main site dashboard I have gridmarket enabled and it is the only one available anyways. I deleted the ones that came with the wp install as well as framemarket here .
I registered a test store to see how that works and noticed that the admin for the test store has to enable gridmarket. Is there a way to make gridmarket the default enabled theme?