"Tick the back door check box that is located in the top left of the screen, then click options from the top of the screen to open up the configuration menu. Now find the hoppers section that is near the top left of the menu and untick the £1 and 20p hoppers, now tick the casino hopper and press ok. Finally untick the back door checkbox, the game should reset itself and the machine should pay out and play normally."
That doesn't work.
It's the £1 hopper that needs ticking and not the casino one. It now works by ticking that instead.