I copied the NuclearThroneUltraMod10.1.exe file into the same folder as the data.win and then ran that file and it worked as normal.
PS. I have to run that exe each time i want to play the mod, if I launch through steam it returns to 2x speed.
It's all good now, i figured it out
Ok, so weird interaction, when I launch the game with this mod everything runs at like 2x speed.