Locate your FTP IP and Port (found on your game server page)
Download FileZilla Client (DO NOT DOWNLOAD FileZilla Server, make sure it is FileZilla Client) or use your own preferred FTP client.
Open FileZilla and enter your details. Your username and password are the same as the ones used for https://control.low.ms.
Click connect and wait a moment. Once connected, you should see a folder named something like "22.214.171.124_7777" on the right, this will contain all your server files. Order your General server now here