How to replace a world in a server (Cracked)

So I decided to delete my server world because me and my friends stopped playing it I was too stupid to backup the world/server but I had downloaded the world to my pc however instead of deleting the server I generated a new world named yes(idk why) now I wanna start the server again but whenever i upload the worlds smp,smp_nether,smp_end it stays the same name as yes and it doesnt work, I don't know if I lost all my progress and buildings because I was playing cracked and I'm at spawn or If It's a new world, So I was wondering how I could delete the Current world named "yes" and replace it with my smp world?