Awesome utility! I use it to convert OBJ files I strip with Blender to make cool new ships.
Note that the install instructions for linux did not work for me. No such thing as a Pip3.6 command, so I created my own install instructions here, if anyone is interested: https://github.com/p-hofmann/SMBEdit
Also NOTE that you cannot use the latest version of StarMade with this! You must use a pre-systems 2.0 version. I use version 0.199.654#20170826_140955