So, a mod with ~ALL~ submarines set to UpgradeClass=1, so that (theoretically) there are no upgrades, save the 18, 21 & 23 boats - and the game runs over the modder's intentions once again, and "rewards" the player not only with an upgrade, but an inappropriate one... It should have at the least sent you to Norway to pick up your new toy... It's a mighty tight squeeze getting out of that bathtub you're in there, but it is possible - if you only have enough fuel...
This calls for some digging... in the files that is, not the sea floor...
