It is aways preferable to reboot or shut the NuiNet down from the Utilities page instead of pulling the power.
You can backup your NuiNet's configuration to your computer/device by clicking on the "Export Config" button. Everything but the user logs is backed up. Likewise, you can import a NuiNet configuration by choosing a previous backup (using the "Choose file" button), then clicking "Import Config".
The status button provides some basic information about the NuiNet, along with how "busy" it is and how much total data the guests have used.
The Locator Sound button causes the NuiNet box to chirp, making it easier to locate.