Hi,
Having the exact same issue: game consistently crashing after base mission. Without a savegame editor I'm forced to turn to you for help.
Seems I'm completely unable to continue playing after coming out of the base. Always crashes about 1h after coming out.
https://www.dropbox.com/s/ujz7hirn11i5w4s/2014-01-07_23.33.39.sav
Br,
_petteri