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.
In the "Thing Files" tab above is a file called bergman-tanks-pack2-stl.zip, which contains all of the .stl files in one zip archive.
All you need to do is download and unzip that file.
There's no way I'm going to upload 50+ .stl and 50+ .x_t one by one...