SoundCentre 2

Bit of a weird one this. I'm running my soundcentre with my MC5, and one one particular track was using the 'default' programme, which at the time was a very interesting little bass interval and ping ponged overlay synth sequence. Having now returned to the track I find that it is an entirely different sound. I have scoured and trialed the whole of soundcentre, (albeit the Korplayer version), and even pretty much all of the possible programmes in Rapture which I have also downloaded recently. Nothing comes close. I have also re-installed soundcentre. All to no avail. How can a default programme disappear like that?
would appreciate any help chaps