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.
he is right. you need to mirror it. Here a Quote from the discription:
"You will need to mirror many parts with your slicer. The chest, back, hips are just half models. I added a "L", "R" or "half" to mark them you will need to print a second, mirrored one for the full suit."