Redo setup on AirPort Extreme initial setup

Help. I just setup my AirPort Extreme for the first time. I used the airport utility setup and ended up with a network named by defaut by the setup utility. I would like to re enter the setup and change the network name. When I go back into the airport utility it does not allow me to select the Base Station options, they are all grayed out. Obviously I have the internet, I would just like to personalize my network and create a guest network as advertised. I seem to have painted myself in to a corner. I'd like to redo setup but keep my passord on my default network.

Thanks in advance,

Steve