I am having the same issue as MikeyUK, every time I try to load an old save it just reverts back to the main menu. I did use the mod in the old game and tried to load with the mod installed with the correct verson and it doesn't work. So I thought maybe if I just reinstall without the mod and try that might work, but no it still takes me back to the main menu for the game. I used the save I have for the 6.1 version of the game, and I even tried to use all the automatic saves but to no avail.