The project has build instructions for building your own copy. These are terminal commands.
You may need to install additional software if you get "command not found" errors. If you Google the exact error messages + the name of your distro, you should find out how to install that. The instructions seem comprehensive, though.
Mint is based on Ubuntu, so the Ubuntu steps should work. I'm not sure what version of Ubuntu the latest version of Mint is based on, though. You can probably find that info somewhere on the Mint website.
You can try to follow the build instructions like mentioned in another comment but be aware that you are trying to build for a platform which has as far as I can see no official support compile instructions for the software. YMMV.
Hence the need to build themselves.
It boils down to: download the source, install the dependencies, (configure,) compile, install. In this case, you need make/cmake.
You could also crosscompile (on another machine), but that's trickier. If you've never compiled something yourself, maybe start with a known-good configuration from your distribution's sources.