If you want to configure the Internet settings of you new D-Link Router manually, click Manual Wireless Connection Setup. It will redirect to 4.4.1 Wireless Settings.
4.3.3.4 WPS Reset to Unconfigured
In Wireless Connection page, Click Reset to Unconfigured, the page shown
in the following figure appears.
Once the "Reset to Unconfigured" button is clicked, the "wireless settings"
will be reset to factory default, other settings will remain unchanged.