This is the Blend file for the Sentry/Meerkat scene.
It has two scenes in it, one with the meerkat and surroundings, and one with the models for the telescopes (which you can also download separately on this website).
You are correct... it's not quite working... the new download solution. I'm having some trouble as well. We are looking into it.
It should be fixed now... we implemented a different solution for counting the downloads. Let me know if there's issues.
You truly rock