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.
The customizer is, of course, just running OpenSCAD.
While it is down, people can get that program, download the thing they are interested in, and load the .scad file – there will be one – into OpenSCAD. There should be some values at the start of that file (it is text based) that you can change.
Then you hit the F6 button (whait a bit) and you can save the STL in the size you need.