ManinSuit

Hi, this looks like a really great programme! I'm completely new to opencomputers (or any form of computer programming for that matter), and wanted to set up a reactor on a server I play on. Unfortunately it uses OpenOs 1.7.4, which is stated doesn't work properly. Is there a way to install a different version of OpenOs without the disk so that I'd be able to use this programme? Thanks you for any help you can give!