For those of you who want to root your Kindle Fire 6.3.1, here’s how to root it. This root method will work if you have Kindle Fire software version 6.3 or 6.3.1.
Just a note, if you Kindle Fire gets “stuck” on Kindle Fire logo. Leave the script running but reboot your Kindle Fire by holding down the Power button. The scripts should keep going once that’s done.
Download: Download KindleFireRootNew631.zip