Hello,

to unlock the 60 FPS lock you need to use the MAXFPS launch parameter.

For unlimited FPS: MAXFPS 0

If you want to lock it to your refresh rate just use your refresh rate number like MAXFPS 144, MAXFPS 240 etc..

MAXFPS 0 together with in-game Vsync is my personal setting for an smooth experience.

Have fun.

Does this introduce any issue in-game? Like physics issues or inability to continue playing somewhere...

Good question, i do never play on unlimited fps but did not had issues with 144 (so far).