Well Sir, I tried.
In fact, the mod unzipped into "Silent Hunter 4 Gold/MODS/Operation Mosun 705/Operation Monsun 705/DATA"
So I copied the folder DATA, so that now it's to be found in "Silent Hunter 4 Gold/MODS/Operation Monsun 705/DATA"
Still it doesn't work. If I start the game, I can only start Uboot-Campaigns from 1943 and 1944, but no 1939-campaign
Life is hard an unfair, I guess
