Changed the text of the docviewer bottom button to "User Guide." Also, redirected it to open the PDF version of the guide. Turns out it is much simpler to open an Open Office document than a PDF for some reason. :-/
Changed the info menu item "Documentation" to "User Guide." Made a minor edit to the about info menu item, and pointed the User Guide menu item to the PDF version of the user guide.
Minor edit to the popup documentation for the Regex filter.