I found some information online about this update which is for 2.2
This is what I found on an old version of the page:
''Hi all! It's almost two years ago since my last release. But Windows Phone Internals 2.2 is almost ready. It beats the modern SecureBoot implementation. And furthermore, it brings custom ROM's, Mass Storage Mode, Root access and many more hacks to all Windows Phone 8 and Windows 10 Mobile-based Lumia-models. There is also a new Download-section in the tool, where you can download everything you need for your phone. Here's a short demo:''
I found this old video on youtube that will help people that are searching for info. If anyone finds any other relevant info please contact me and I will update my website. It's important to keep the legacy alive.