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.
Glad you like it. To my knowledge, every slicing software allows you to isolate separate bodies in the same stl. You should be able to delete one of the two grips when slicing - I use Slic3r as my slicing software btw.