There is a mod included with the game that fixes tthe issue for you if using the Force 60 FPS option doesn't work when your monitor is set 144hz+.
Open mods.txt in the www folder, and look for the entry fpr FPSLimit, and replace it with this line, since Rem didn't populate the paramiters when he included it.
JavaScript:
{"name":"FPSLimit","status":true,"description":"An alternative way of limiting FPS for fast monitors, turn off FPS Sync in the ingame Settings if you want to enable this mod.","parameters":{"FPS Limit":"60"}},
When using this mod make sure Force 60 FPS is set to OFF.