Frank:

You can install the Linux version by clicking the link. It installs to the desktop of your computer. Change the properties of the link-icon so that double-clicking the icon runs the program.

You can install the Windows version by clicking the link, It also installs to the desktop, and is ready-to-run.

I assume for Mac it's the same, but am not sure.

The Export to SH3F should work "out of the box".

Hans