The v1.02 patch includes bug fixings like disappearing units if embarked troops enter combat or formations who got lost during change of maps and changes in gameplay (for instance much higher range and lower ammo for aircraft). It also features new adding like paratroops that can be placed in airborne mode if air deploy hexes are available, sashes and tooltips that indicate the armies / army groups a unit is in and also scenarios have been improved with changes/adding.
For the full changelog you can visit the related Forum Page.
To download the update, players can run “Check for Update” via the game menu or on the game’s download page.
Get more information on Germany at War: Barbarossa 1941 from its official product page.