Reboot the computer and try again. If that doesn't work, since you are near the end of the game, either complain to Big Fish or check a YouTube video to see the end of the game.
Some of my Big Fish games crash while auto-saving, but manage to save anyway. So when I reboot and try again I can continue from where I was before the crash.
It would be better if they didn't crash at all, but it isn't a huge problem if rebooting fixes it and I don't have to replay anything.