First , sorry my english ...
I installed the demo version of minecraft and I ended up buying a microsoft application in the store.
It turns out that whenever I play , appears the message to say that I'm in demo and if i want to purchase the game.
Only after turning me as a user and go to store, te store ask me if I intend to buy again the application and when I say no and go back to the game is already unlocked.
reinstall it ?