Just a quick guide detailing how to adjust the framerate limit.
Chex Quest HD FPS Cap
Changing the Framerate Limit
To start navigate to: %localappdata%ChexHDSavedConfigWindowsNoEditor and open GameUserSettings.ini in notepad
To adjust the frame limit change FramerateLimit=0.000 to the number you desire, leaving it on 0 will just set it to the default 62fps limit
Save the file and run Chex Quest HD and you’ll have a higher frame rate more suitable for higher refresh rate monitors.
Shouldn’t cause any issues with the game, I finished the second half of the episode and had no problems.