Astra won’t let me change menu

Following a YouTube video, (@ 43mins, give or take) trying to change the main menu, but when I follow the instructions, it doesn’t behave like in the vid. Instead it displays a greyed out ‘Astra menu settings’, with a sideline link to ‘Unlock’, which takes you to a ‘Buy the Pro version’ promo, so you can do this and all sorts of other wonderful, exciting things. Is it possible to change the menu, like in the vid, using the free version?