I think I had the full version and didn't know it. After I played it, and won some rounds, I could buy more planes and go on more missions, but I saw there was an update for the game, and updated it. Now I'm back to the demo versionDo I uninstall the demo first. After I tell it to install on Sidequest, it installs for about a minute and stops and said it was installed properly, and I go back into the game,, and still shows Demo on the book in the beginning scene. I will keep trying. I'm sure I will be able to get it back. Thanks for your help