Dasher

I have just assembled the Volvo Hauler and downloaded the control+ app. The app calibrates the model then goes straight to the tutorial which then stops part of the way through and I can't get any further. I can't access any other screens. I have to shut down all apps because I can't exit the screen. Has anyone any ideas why this is happening? I have tried reloading the app but it is still the same. It happens on my Samsung tablet as well as my Samsung phone.