In order to remove the Overview, FAQ, Tour, Join menu items from the signup form and mini-site navigate in the merchant panel to Configuratoin > Design > Signup Page theme > click "Edit theme" on the currently active theme and find the following 2 theme files:
topmenu_logged.stpl
topmenu_notlogged.stpl
In those files delete or comment the following lines:
If you want to add your own link, don't forget to add double # before and after each link.
In those files delete or comment the following lines:
<li><a href="index.php">##Overview##</a></li>
<li><a href="faq.php">##FAQ##</a></li>
<li><a href="tour.php">##Tour##</a></li>
<li><a href="signup.php">##Join##</a></li>If you want to add your own link, don't forget to add double # before and after each link.