I bought minecraft but i can only play the demo and i downloaded the launcher twice

Hi, I am currently having an issue starting the launcher. I bought Minecraft around 8 or 7 months and today, 1/2/2021, I was able to play Minecraft, but I closed the launcher to do something else, and when I opened it again to play, it said "Play Demo" (This keeps happening.)

I need a solution, Thank you