Were you using Version 0.5.3? It's the current newest version and it preserves dub data in the event of a crash. If the game crashes and you reload a pack, it will ask if you want to continue where you left off--but that's only a feature in the newest 0.5.3 version. (I will note, at least two people have reported that the dub reloading doesn't work in 0.5.3 which I have yet to debug though)