So like, I bought a Minecraft server and I'm trying to change the world and version of the server, but I can't. Number one: I went into my FTP File access and it doesn't even have a world to begin with, and it's saying I have to replace one. I deleted it and added my own in but it's not showing up on the multicraft view server section. Secondly, it doesn't even say I have a jar so I don't even know how to change it to another version. The customer supports sucks A** and don't even reply.... help please?