How do I open a Certificate Trust List file in ProDesktop?
I downloaded a file off of thingiverse.com, a 3d modeling file. The file type is Certificate Trust List. When I try to open the file through ProDesktop, it says that the file is not a Prodesktop file. My teacher wants the file to be in ProDesktop and wants it to be .stl file. I tried opening it in AutoDesk Inventor and it work but then I tried to export it as a .stl for my teacher, a message popped up saying that the model was invalid. I then tried to open it in Sketchup but it said that it wasn't a sketchup file.
Please help, any info helps.
The link is http://www.thingiverse.com/thing:2052282/#files