Need help with downloading ruby

I have recently got Beginning ruby from novice to professional by Peter
Cooper. I tried downloading it for windows as he said, but the version
seems to have updated and the site is changed. I tried downloading it,
but not everything seemed to be there, I could not find the fxri, so it
probably was the wrong one, what do I do, where do I get the right ruby

Fabio Kobuti wrote in post #1182065:

When I hit the download button though, there’s so much to pick from,
versions, dev kits, and more, where do I go from there?