Does RadeonPro not work with Nvidia drivers? I tried downloading it but it keeps crashing for me.
I don't think it does, they're rivals after all.
You can fix the refresh rate issue by setting a custom resolution using Nvidia Control Panel and setting that as your desktop resolution before you launch the game.
1920x1079, 2560x1440, 2880x1620, 3200x1800, probably any resolution that only gives you 60hz will do.
The problem is that the game has 1080p but it doesn't let you choose the refresh rate manually, and for some weird reason it just picks the lowest.
Crytek games do the same, but it's much easier to fix there, you just have to alt enter twice (or reset vsync) and it's back to 60.
EDIT: About your edit, the game won't list 1440p, you have to set that as your desktop res and set the game at 1080p fullscreen, it will then run at 60hz