Hex I can see why you thought it was from Cooler Master its identical looking to a CK350. If its a knock off it's pretty impressive.
I would imagine there are no drivers / software for this keyboard and the RGB control is just built into the keyboard.
If changing the colour mode is on insert instead of tab I am guessing the Cooler Master driver is still installed as thats what the CK350 uses so removing that and it should default back to whatever is built in e.g. using the tab button.