There are updates available for the game, but the game plays just fine right off the DVD. If you want to play online at HyperLobby etc, then you should update the game to 4.08m. Before you do that play the local game for awhile to be sure it plays ok for you.
Google "tga viewer"
Just in case here is the URL
http://google.com Then in the dialog box type "tga viewer" ... enjoy the game and welcome to IL2 1946!