The current version (0.87.11) is the most recent one. I believe just installing an updated version will carry on your saves.
Currently no good endings, I don't know if the creator intends to make a 'good' ending because the main character is supposed to be a moron in a dystopian world. You could imagine how that goes. Though you can just happily live with your bot for as long as you desire, it's not like the game ends on a random day