I used whatever came packaged with the latest Piratez, what needs upgrading? Also, I did not have 10+ enemies in sight. Max I got to was 8. There are specific squares in the map, like the one shown, that if stepped on form any angle CTD. Also had things like this happening;
I had a unit with a Cannon standing where the movement box is. On the alien turn she went unconscious for no reason (was full health, no stun, no aliens shot at her) and her body ended up 2 squares away on the stairs while her cannon ended up inside the stairs and was not retrievable.
Seems like a very buggy map.