https://filezilla-project.org/download.php?type=client
Instructions:
Step 1: Once downloaded, run the installer and open the program.
Step 2: Log into the Game Panel and view the game service you'd like to log into FTP for.
Step 3: Under the 'Server Information' tab you will see something that says 'FTP: server ip:ftp port'. Copy these numbers. They should look something like this: IP SERVER:8821. Paste them into the 'Hostname' box of FileZilla.
Step 4: The username/password are the same credentials as you use to log into Game Panel. Your password can be changed from within the panel.
Step 5: The port will automatically adjust itself to whatever the correct value is (8821) if you copy/paste the 'FTP' info from the panel correctly into FileZilla.
Step 6: You're all set! You can now begin dragging/dropping files to and from your server.
Note: If your service does not support FTP (for security reasons), this will not be possible.