Hi Johnlax does your SH3 Folder where your Campaign game is installed look like this
with the Commander Mod Config File Exe.
I started a new Career with Werner Winter October 1941 went out on shakedown cruise and came back to port
Then I pressed escape docked at my home port and left the game fired up Commander Mod added 730 days to days spent in port and clicked apply
Then I launched SH3 from the Commander mod yes the Commander Mod/SH3 can be tempramental at times it crashed on me at 90% along the red bar but on the fourth time success it worked in my Uboat in Port October 1943