Progress saving - Fixed

I have fixed the problem that some people were having with progress not being saved correctly. Since the save-games were not actually being lost - simply "hidden" I have also added a thing at startup which attempts to search if there is a hidden save-game which is further advanced through the game than your unhidden ones and if there is it unhides it. Hopefully this should recover your lost save-game (or at least one that is very close to it).