Hi Ronco
The ability to fill the tonnage bar seems to be a bit of a problem for some of us at the moment.
I have only had the problem since reinstalling from the dvd as the Uplay part kept of the installation kept coming up as a windows error.
I get the Game Play Launcher from Ubi.com although it is also available from Uplay.
I am also experiencing the same problem as you but on the Baltic Patrol.
I do not have an answer I am afraid.
It is generally recognised as not being a mod problem.
I normally play with around 40 mods but am just using 14 at present for the Baltic.
The most likely cause is the Ubisoft Game Launcher.
I have tried numerous combinations of the UBL in and out of the x86 Program folder and also I have tried using a UBL from a backup last June.
So for me it is w.i.p.
Check this thread out as it may be of some help to you
http://www.subsim.com/radioroom/showthread.php?t=215401&page=4
Did you install from a dvd or download?
Peter