[HW3]

After looking at the mod, the problem appears to be with your basic config file, as that file assigns the torpedo loadout by year for the various u-boats. Now why it lets you change them in base, and then reverts back to the standard loadout, I have no clue. There was a mod out some years back that let you change the standard loadout to what you want for any type of u-boat. That might solve your problem without having to reinstall. I'm not at home right now, so it will have to wait till I get there to find out the name of it.