Okay, that's good to know - I have options set not to view sigs, didn't even occur to me to check.
I think I might have been having problems with the mod before because of an older version of the St Naz & Schleuse mod that I d/led somehow, not sure how I got linked to what I had originally. Or maybe I just had a corrupted download or extraction, who knows? But I don't remember the file I had before being v4.7 so that may have been the issue.
Anyway I got the current version of it from the URL in your ReadMe file and enabled that, then v2.7 of your mod, and just completed the first patrol of a new career with no problems so far.
Edit: OMGWTFBBQ I just printed out my crew list and I have Otto Kretschmer as a bootsman!
Maybe I should let him set up all the attack runs? Lol.