I guessing it may have something to due with that patch, sine it had a lot of bugs (so I hear, I actually haven't patched my game at all). Civilopedia game crashes are common, and are one the more important of patch 3.13's many improvements (unfortunately, that patch still isn't out yet)
Since the mod has blizzards, it is clear that you are not playing FfH II, but FfH: Age of Ice, the senario that was included with BtS. That senario is a prequel to the event's of FfH I or II. It is a much smaller, simpler mod, which, while not terrible, can't compare with the real FfH. Issues with that mod should be in the Fall from Heaven: Age of Ice subforum, not here.
Patch C wouldn't do you any good, since you don't have FfH II yet. Before downloading patch C you would need to get the main game (a 230 mb download). Actually, the main download had probably been updated ti include everything in patch C, so using the patch would be kinda pointless. The 300 mb media pack is optional, it basically just adds opening and wonder movies that you don't need to play the game, but which those with really fast internet might think enhances the experience.