From those two snippets I would assume you have to replace /home/user with /home/yourusername
. So let's say your username on your Linux Mint installation is "frank", that would be /home/frank.
From there just follow the instructions. So copy the scamp executable (I have no clue, just repeating verbatim) to /home/user/THELI/theli-<version>/bin/Linux[_64]/. Replace <version> with the version of theli installed. And if you have the 64 bit install at _64 at the end, but don't add anything for a 32 bit install. I'd assume these folders already exist and were created by the installer, so you would just have to browse there. Anyway, with the <version> and [_64] both replaced you have the actual path and that path you need to add to your $PATH environment variable. You do so by editing your .profile file and at the end adding a line like (but again, with the bits in red replaced for the actual path:
You want, you can add that other path as well by adding another line:
Without knowing what program you are actually using, I can't help much more with this. It all sounds a bit silly to have to add these things to your path and I would just try to use the program without. Doesn't it have a menu entry from which you can start it? Putting things in your path is generally reserved for programs you need to frequently launch from the terminal, and while being in different folders.