Add your QR through the Settings on your Software menu.
Click anywhere on the software display screen to access the menu.
Choose 'Unlock Admin' and enter your password to expand the menu and find Settings.
Click Settings>Tile Settings>Show MZ-Open QR Code.
And remember, the QR code has to be displayed for MZ-Open participant tiles to show on the screen. If you have printed a picture of the QR code for members to scan elsewhere, it still must be on the screen. No QR code, no MZ-Open tiles.