[propbeanie]

The German boats are in the v1.5 Uboat Missions "add-on" - which you have to pay money for...

Steam uses a different sort of "licensing" on their games to prevent the user from "illegal" activity. The v1.4 update will alter the executable file, and Steam will no longer recognize it as a "Steam" game. It used to be that you could grab the game folder and copy it elsewhere on your computer, and that can no longer be done. The game won't run. You have to use the Library in Steam to re-install the game into a different folder from the Program Files directory. That will allow modding, but the last I'd heard, you couldn't put the v1.4 update on any longer. You could always try and see what it does, if you don't have your game installed in the Windows "protected" folder Program Files or Program Files (x86) folder. But don't expect it to work. If you do a "Verify" in Steam, it will overwrite everything changed since the install, so be aware of that also.