Tutorial [Updated for 1.0] Server setup for Multiplayer Without Steam!

When you run the game and load in a character, it "locks" the universe file. So that you don't accidentally have more than one person trying to write to it. If the game is kicking back an error about the universe file being locked, then it means you already have the game open and running somewhere else on your computer and you need t close it so the server can use the universe file.