I tried making a server like 3 weeks ago and it didn't work so I tried to do it again today. I deleted all my old server files and now when I try to run my new server it says, "there is another server running on this IP perhaps?" So how can I delete it when all my files are gone? I'm running on an emachine, Vista.
Yes. The server application loads the configuration files, which can be used regardless, and it also loads the files in the world folder. Deleting the world folder deletes the world you were using and all the player data.