private void updateUsers(){
		xm.getUsers().get().set("FileVersion", currentVersion);
		
		String group;
		String[] worlds;
		String[] allUsers = getAllUsersOnFile();
		for(int i = 0; i < allUsers.length; i++){
			if(xm.getUsers().get().isSet("users." + allUsers[i] + ".group")){
				group = xm.getUsers().get().getString("users." + allUsers[i] + ".group");
				worlds = xm.getXgroup().getSupportedWorlds(group);
				for(int o = 0; o < worlds.length; o++){
					xm.getUsers().get().set("users." + allUsers[i] + "." + worlds[o], group);
				}
				
				xm.getUsers().get().set("users." + allUsers[i] + ".group", null);
			}
		}
		xm.getUsers().save();
	}