i cant play minecraft wtf

(that's for all versions) I normally have an mc account and play a lot tho today smth happened (not gonna explain) but long story short I moved some files along with Minecraft and when I dragged it out and opened the launcher it had a message "visit this website to buy the game" or smth like that and instead of it having the message play Minecraft it said play free demo and I was like wtf I tried everything I could to fix it like logging of my account restarting launcher visiting website and trying to fix it my account was ok btw I still had it and then after 2 hours I gave up and said fine f u ill buy mc again didn't have a too valuable account either so I went to buy it and it said you already own mc java edition buy windows 10 edition while in launcher it says I don't have it and can only play demo pls I need help(sorry for bad English) btw