You are safe I missed them!
So far I've downloaded the app and then used Astro file manager to "open" the qct file for the 1:50,000 maps. I have also signed in to my Memory Map account from the phone too, which you need to do the first time. The "free" road atlas map that comes with MM opens fine, but you should be able to zoom in and the 1:50,000 will then open automatically but it doesn't, the screen goes black. The GPS location symbol (a red circle with cross hairs) will stay on the screen and move if you move the map around, but the screen is black. I can plug the phone in to the PC and open MM on the phone via the PC so everything is there somewhere. In the settings it is showing a licence for the Landranger 1:50,00 maps, and showing that I am signed in.