MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
Definitely no way to avoid supports. I printed mine, bottom side down. Be sure to keep the supports low density, and be sure you have at least 1 mm horizontal separation between the supports and the shell. My first print had to be scrapped because I left the support density too high (I was using a new-to-me slicer, so missed that setting).