Having an about page is a optional feature of Citizen Space. If you don't create any content for an about page it will not show up in the main menu. If you create content it will show up in the main menu like this:
To edit your about page
1. Log-in as an administrator and click on 'Pages' in the menu. From the resulting list of pages click on the 'About page' towards the bottom of the list.
2. Enter your about text in the box and click 'Save'. This text will appear above the existing standard information.