SPWW2 corrupted?

[keepitloki]

I'm still running the old version of SPWW2 and it has stopped changing the date in the editor and battle modes. Even if I change the battle date on the start screen it is always reverting to November 1942. In the editor this is on screen but in battle mode it tells you you've changed the date but as soon as you go to the player 1 purchase screen it changes straight back to Nov '42.
Any thoughts? or a full re-install? I don't think this should affect my games as they're all on basic security.