Try using the public beta branch.
Other than that, you'll have to wait for the 1.1 update which should hopefully fix your issue. Maybe try compatibility mode for windows 7 again, because that has worked in every other case.
You asked on Discord as well and I responded, but you didn't respond to me. I'll paste my response here.
Do you mean that you just see a blurry city with no menus when you start up JC3MP? If so, run JC3MP in compatibility mode for windows 7.