The current stable build of Project Explore is far from stable when it comes to saved games. The world constantly corrupts and I felt that it was about time I do something about it. With the massive re-write I've done for the rest of the game I don't see why I shouldn't just clean the rest of the mess with it. Below is a graph that explains a bit more about the new save system.
The full-size image can be found here: http://i.imgur.com/BzXTOei.png