WavTap stops working - unable to monitor audio

[RobPatersonUK]

Excellent piece of software - only problem is it's stopped working. When I start WavTap it sets the system output to WavTap as expected, unfortunately I can no longer hear the audio, it's as if WavTap no longer passes it through... I've uninstalled, trashed all leftover files via Terminal and reinstalled but no dice...

I'm on OSX 10.8.3

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Edit - if I create a multi-output device composed of WavTap and the on-board output, then I can use that device with WavTap and record what I hear. Which just means changing the output device when I start WavTap. Hope this helps.