Birth of the Federation

Please help! I'm playing the best game I've ever played since the game came out and every time I get to turn 165 the game crashes! I'm in the habit of saving each turn every time I play so there is a back log of previous turns where I can alter the course of what I do - sometimes I get a little past...

I had a similar problem with a previous game. Now I routinely save my game after every turn as a backup in case something glitches. Yet during one of the best games I've ever played (bloody typical) the game crashes at the end of turn 28 no matter what I do. I get no crash log and it doesn't matter ...