Pyro Audio Creator audio playback

I recently downloaded 2.5 hours of audio from my TV. But during playback to clean up the audio, I can only play back 21 minutes of the recording. But what is funny, when I first open the file in the Editor, it shows 2.5 hours of material. What do I need to do to listen to the entire audio file for clean up before I record to a CD? Thanks Jeff.