[Boris The Spider]

You now have expanded choices for the altitudes of clouds, mission height and situation differential. In addition you now have the ability to put in a custom altitude for clouds and mission height as well as differential altitude . Just click the box and put in the numbers you would like.
There is also a feature ( the 'Pos.' button) that put you directly behind the enemy ('A'=Advantage) or them directly behind you ('D'=Disadvantage). 'N' is the original setting where the enemy comes at you from a distance.
Also new maps (stock game) were added as well as a "Scramble" setting for "Target".

Hope that explains it a bit.