So as an update, I used the TWRP utility and the following instructions to reset a rooted Fire to factory. Worked perfectly, problem solved!
http://www.jayceooi.com/2011/12/28/h...le-fire-video/
BTW, here's the rooting utility that I installed originally; it had the TWRP utility on it so I just used that per the above video.
http://liliputing.com/2012/03/root-k...e-utility.html