I started my Minecraft today with my normal Account that i have since many years, but i needed to log in twice in the minecraft launcher and my password was not saved. Atfer logging in I started Minecraft normally, but then it was just the demo version of the game. I tried to log in on other clients for example Lunar Client (version 1.8.9) and I had no issues. I just had issues with starting the game in the normal launcher and then with the demo version.