I'm not sure if this is from changing the default settings, or a recent update. I haven't started a new game in a few days, but did today, and made a custom world. Just about the time it should render the world, it crashes with an error about tigersharker.lua. The strange part is that the file just isn't there. Verifying game cache integrity didn't fix it, so I'll try reinstalling SW next.
Start new SW game with Wilson. Change some world settings. Play...crash.