Thanks red october

. So I am looking on steam and it seems in order to get updated to 1.5 I need to purchase the U-boat missions. Can anyone confirm? I ask because I believe the mods I am going to run are set to 1.5. The steam forums seem full of conflicting data and misinformation...
edit: So I procrastinated my studies a bit and dug around a bit for more info. It seems steam is just fine as long as I get the U-boat missions which include the patch to 1.5.