+1 on what propbeanie said up above...
Yeahhh...
Steam, in its... stupidity, set up access to SH4, they did so with 2 different versions of SH4.1 that is straight up U.S. Fleetboats, aka SH4 v1.3/v1.4 of it &... the other, is U. S./Uboats availability SH4 v1.5
The one you had showing in your screenie, was of the former set up... & was NOT the latter half there... aka v1.5 SH4
The copy you now have, should read:
Silent Hunter: Wolves of the Pacific Uboat Missions (which is v1.5, or over on Ubi's side of it all... would read as 'Gold Edition')
Now, all of the kept up to date mod sets or single mods, call for v1.5 of SH4.
M. M.