We don't document the randomized header at this time, as it's a feature we added for a few "power users" and are still testing its UI functionality, as to not confuse the average joe.
Good point, though -- it probably makes sense NOT to put those features in the changelog, and just tell a few selected users, until we have a better understanding of how the UI is best presented to ALL of our users. Sorry for the confusion.
README.doc and INSTALL.doc as well as text versions README.txt and INSTALL.txt come with the software, as well as help screens at the top of every page. If you'd like to submit another ticket with suggestions on how you'd improve the documentation, we'd love to read it, and place a great emphasis on customer feedback.
One thing we're definitely missing is a "how to" guide. Right now, we simply do what most major software packages do -- explain each feature and how it works, rather than walking a user through every possible step. Sometimes, ABP users get overwhelmed by all of the features, and prefer a "this is step A, this is step B" guide.
Sorry that you feel the documentation made it not worth $300. We've had a lot of pressure to raise the price to keep the distribution lower (we have thousands of licensed domains, currently), so perhaps it makes sense to add some power-user documentation and raise the price.
Thanks a lot for your input, and welcome to GFY -- I noticed this was your first post.