Hi there. New guy here. I just ran through this tutorial and from a new guy perspective you may want to start with the fact that this plugin needs to be enabled before you can even find the Texture Graph object. I was searching for a while before hitting up Google on where to find a Texture Graph.
Also within the section " Creating the Dividing Lines", step five made no sense to me. But I just skipped it and forged ahead with the rest.
Thanks for putting this tutorial together. It was fun to follow and to see the results in the preview window.