Chroma72 I'm pretty sure that monitor refresh rate has nothing to do with it. It doesn't limit the framerate of your game. If all your other hardware is capable of running the game at 100 FPS, on a 60Hz monitor you will be able to see only 60 frames per second, but the game will still run at 100 FPS.
That's not right: Construct ticks at the speed of the display. So on a 60 Hz display it will run at 60 FPS, and on a 100 Hz display it will run at 100 FPS. Assuming your game is designed to be framerate independent, as described by the tutorial, it makes no difference and gameplay will proceed at the same speed regardless of the framerate. However if it is framerate dependent, gameplay will proceed faster at 100 FPS. As noted in the tutorial, the Physics behavior is an exception and defaults to framerate-dependent to make the simulation deterministic, and you need to opt-in to framerate-independent (and non-deterministic) behavior.
In retrospect this was probably a mistake, since the default means physics works at different speeds depending on the display refresh rate. But it might be difficult to change the default without breaking backwards compatibility...