Mystic crashes C5 Win 7 64 bit

was using Mystic two instances and Spector one instance could not mixdown or do batch export
the only way to prevent crashes was to export in real time
even when all the tracks are exported as audio into another file I sometimes have to do real time export this is a new problem, I have never had problems exporting straight audio tracks
what ever happened during the trying to export Mystic has screwed up things