You can access your files via SSH File Transfer Protocol (SFTP), a secure alternative to FTP. You will need an SFTP client; there are many free ones available. Two popular ones for Windows are WinSCP (graphical) and PuTTY (command-line).

SFTP Client Settings
Protocol SFTP
Host website domain name e.g. blog.example.com or blog.john.bitmashuser.com
Port 22
Username u_username e.g. u_john
Password Your password
(If you would prefer to use a private key instead, please contact Bitmash support.)