I bought Minecraft in 2012, and have played it for over eight years. I've had the same installation on my current PC for over three years, and have played the game many times. Today I logged in and launched the game, and it only showed the options for the trial world. I logged into Minecraft.net, and it doesn't seem to show that I own the game. I used the Microsoft login, and tried to log into my Mojang account from there, and it still only gives me the option to buy the game.