Installer fails, New WPMU DEV Hub

I'm excited to use this platform. I created an account ( I followed the steps with GET STARTED. I clicked Install Plugin for WPMU DEV Dashboard. In FireFox it downloads a ZIP file. I open it but can't find any installer. Thus I am stuck. I also tried the same using IE. When I click Install Plugin it says "Error on Page". Again I am stuck. I manual opened the ZIP file but again I can't find a EXE file to run. What do I do to get started?

Thanks Dave