What's this? - This is simple KUAL addon which automates work with versions.txt from
that guide
You do this at your own risk.
How to usage?
1)Download
proper firmware for your device
just for example and put in root of ur Kindle
2)Download downgrader.zip and extract folder from zip to extensions folder on ur Kindle
3)KUAL → Downgrader → Choose ur device.Device reboots and donwngrade firmware to the version you downloaded