The utilities were linked by certain users when responding to others. Do you need those links?
Originally I was trying to downgrade (using diags) through this method:
http://ixtab.tk/kindle-touch-images/README.txt. I was up to step 4, in the process of accessing my Kindle through SSH, when I went through the menu and hit install fastboot by accident.
I didn't overwrite anything, I didn't actually get to touch any of the files, so they remain untouched, it's just the kindle that's stuck.
I have a Kindle Paperwhite 2.