It seems the author prefers to remain hidden for whatever reason, I ran into the same weird issue finding an official source. I do have the latest version of the tool *I* could find, if you want it. It came from a legit looking site and seems virus free in scans I ran, so... your call.
You'll also probably want a hacked nvflash that allows flashing modified bioses. I have that too.
Word of warning on the Maxwell tool though, the AMD ones were WAY less confusing. Feel free to PM me if you're lost, I have some guides that helped me I'd be happy to share. It's still a sort of mysterious process I don't think anyone properly understands, all the settings in that tool. The authors disappearance doesn't help I am sure.