I fixed it!
I,m so proud of myself, (being an old git)
I googled "refreshrate numerator" were I found someone had this issue with a similar game, the advice was to change the number to the refresh rate in dxdiag, so as my refresh rate was 70hz, I changed the 60000 to 70000
But it still didn't work, so looking for other things I see the game had set my screen size to something different from my dxdiag, so I changed that as well, and now it works!