I downloaded the program but am completely lost. What do I do with it? I get that I "Import" an .obj file, but then what? And what is this about saving? Where do I save it? Do I replace the .obj file in the geometries folder with the new one? I saw something about resaving it with a different name, but wouldn't that cause problems with the rest of the package and it's files?

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi