Welll...... I thought the software was just a simple download and install the way you typically download/install computer software and the 'driver' or arduino sketch was uploaded just like any arduino sketch.
Do you need more info on those processes? This might help, too:
I get a message that the https://www.fatalmentality.com/ website has "expired" - so not sure what is going on with that end of the equation... might also be why it's hard getting through to the owner.
Do you have the actual files? That will help, too. If not, they might be a bit harder to come by with the website down. I think I have a file folder for that so might be able to upload if you need it.