This is a database patch so if you upgrade you will lose your saved game. Don't upgrade if you want to keep playing the same campaign.This patch can only be applied to version 4.2 or later. To apply the patch just unzip the Aurora600.zip file into the installation directory, overwriting two files. http://www.pentarch.org/steve/Aurora600.zip (12Mb)This version has a LOT of major changes, so there are likely to be some bugs. Don't invest too much time in setting up new campaigns and treat this as a beta release. This database in this patch contains my current Aurora campaign as an example game.Steve