The old guides are on the old forum. It has been closed and all threads on it were archived. You should be able to just see them by going there, but I recall a small while ago the forums went down, not sure if that was because of the hack or because its validscriptthingy ran out.
So after much searching I did find the patch note highlights archived but they ended exactly when I last had a computer, when Starfall was released. Still hunting for anything after that time most specifically Wellspring expansion.