LGN1, regret being the bearer of bad news, but v1 apparently isn't working correctly for me, either.
I did a basic test when I got SH3 Log v1 just to see that it would load and cycle. OK.
After seeing sublynx's post, I created a career, ran a patrol, and tried to claim tonnage with SH3 Log. It cycled and found my test commander's folder. I entered 1 merchant and clicked "Create entries". Nothing happened. I tried 1 warship with the same result. No line of data entry boxes.
Just to make sure, I tried the same career with SH3 Log v0.5. It worked fine. (Although, I did enter a claim of 1 Bismarck-class battleship, 50,000 BRT, sunk at AO77 on 1 August 1939. BdU "reluctantly" confirmed my claim, but criticized my sloppy note-taking. Guess the desk-sailors had a few extra liters of Pils with lunch.
Next patrol, I'm claiming the Ark Royal!)