Turning off strange dev menu

Hey, can you help me with turning off this black menu? My app lagged and I tried to turn it off using ‘back’ button, nothing happend so I started clicking more buttons to check reaction and I turned it on accidentally by using colour A B C D buttons. Now I can’t turn it off. Tryied reinstalling app, disconnecting power plug for 1 min. Nothing :frowning:
I can’t use app with this menu…
App owners told me that this is tv dev/debug menu.