Pop flash once again. You won't have actual button but you still have metal lever to do so.

Unscrew 3 screws that attach flash to the camera body.

Gently move away flash from the body. Disconnect flash flex circuit from the camera body. No latches this time!

Carefully slide flash tray out of the camera. See last picture illustrating tray mid way out of the camera. Pull the tray completely away from the body.