When I open the Minecraft launcher app, it says Play Demo, I don't understand. I bought the Java Edition a month ago but it won't work. It doesn't let me join servers and when I try it says to try restarting your game and the launcher but I'm not sure how to. It said this only today, it was working fine yesterday. I don't know what it means. It also says on the launcher app that migration has started but I haven't gotten a notification.