How does that work at all?

Hello!
I got to know a board from around 2006 and I really fell in love this old-retro format.
I would like to start my own forum using this software, but I have no idea how to go about it. I haven't found any specific instructions or anything like that, just the file for the new version 1.9.12.03. But what should I do exactly? And in the end, ideally, the forum should also be accessible via a link, right?