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.
There is just the one OpenSCAD file, "parametric_butt_hinge_2.9.scad".
There is only one file, because it is a parametric model that you customize via the model's parameters. Thingiverse also only allows one parametric model at a time, in order to simplify integration with the Customizer.
You can open the model in the Customizer, and set the parameters you want there. Once you are happy with the model, you can press the "Create Thing" button, to create a remix of the model. Then, you can go into your new remix of the model, and download the STL file from there.
If you do print any, I would love to see how they come out!