Actually just Save, Save, Save at any minute intervals won't always help. Need to alternate save locations, or increment the filename, OR keep checking the backup save file after a crash. Poser does actual make a backup copy before a save back to the same filename - can't remember the name of it right now, to protect when it eats it's young during a save. But it'll happily reuse it, so you need to fish it out before reusing Poser again (on the same .pz3).