Progressive crashes and large(ish) preset file

Ive been programming a show on and off for the past 3 weeks all internally within the duelist and inevitably the presets txt file has became quite large. As things have gone on saving presets has begun to take longer and longer and now more often, when saving presets it hangs catalyst and i have to force quit.

Ive had the lowing down of saving presets before when doing shows but never to this extent and the txt file is only 64mb.

Does anyone know a way to maybe PURGE unused data in the file, removing all unused presets within catalyst e.g clearing all layers etc.

Im sure I'm not the only one who has experienced this?

Thanks

Andy