meTNTc

I started harcore world long time ago in single player than i transfered it to minehut and everything worked fine but now the world started lagging and i decided to download it back. I downloaded 3 folders : ul_world ul_world_nether and ul_world_the_end. After that i created new folder in saves folder and copied files into there. World is good but when i am treying to play playerdata gets changed to the old one (it replaces with the one before transfering to minehut) what should i do to stop that? p.s. my english is bad