On the homepage screen of DNTV Live!, right click and select FM Radio Mode. Then choose a station that you have preset in the configuration screen.

Note for DNTV Live! PRO Users Only - In order to hear the audio in FM Radio mode, you must first connect the Auxiliary audio cable found in the DNTV Live! Pro package from the DNTV Live! Pro to the Auxiliary (or CD Audio) input of your Sound Card. Then, in your sound card's volume control properties, make sure the Auxiliary (or CD Audio) input is not set to Mute, and that it is at a respectable volume.