Removing the adult themed games from your arcade is simple. All you'll need is regular computer keyboard and a few minutes.
First, plug the keyboard into the USB port on the side of the motherboard, located behind the coin door inside your arcade machine.
Next, when you are at the game selection screen, press "z" on your keyboard to bring up the sub menu to show and hide categories.
Select "show/hide categories" and uncheck the adult category.
Return to the main sub menu and select “save user configuration”.
Finally, after it has finished saving, restart the machine by turning it off and on using the main power switch at the back.
Now the adult titles are removed from the main menu of your arcade.
To add adult titles back to your main menu simply reverse the steps above.