The menu provided is as is and not designed to give different variations of any other navigation menu, which would of course, need major code modifications to change.
Maybe, depends if Neil wants to carry on making things for now an obsolete piece of software since Serif themselves have stopped making/supporting Webplus
Backup? If you are referring to support, apart from the serif community plus forum, there is none. We can only support our addons via this forum and not webplus itself.