Halion 2 missing Trip

I opened a project yesterday and only the drums and audio files worked. All of the Halion sounds had been deselected. I had to manually set all of the sounds up again. The TRIP sounds that I used have completely disappeared. The name is there but won’t load in Halion. I opened the project again today … still no TRIP and the Halion presets had disappeared again. Am I missing something? (apart from the sounds)