There is unfortunately an issue with windows that prevents the mod from reading and writing a file at the same time. This is holding up the implementation of an auto save feature.
That's not to say that it couldn't be added with some clever trickery, but I think that at this point they are focusing on rewriting a huge amount of the code for the 1.1 release (at which point it will be open sourced, which means someone could just add the feature if they figure out how)
