I'm trying to set a ls% record just so i can go off and see where i can improve, but when i enter the barber shop the game freezes. I tried deleting the .set file and one core affinity is set in dxwnd. Any solutions?

You need to use Rockstar Nexus downgrader, it will give you v1.0 exe and the original registry entries so you can upgrade to v1.01 without any problems.

Title says it all.