From Utilities | FTP click 'Connect to an FTP Server' | Select 'Secure FTP/SSH'
Complete HostName, Username, Password, Default Local & FTP Directory | OK
This results in an error:
"No such file" followed by an Access Violation error
No 'Private Key File' entered. Connecting to a Secure FTP or SSH server requires a Public/Private Key pairing (The public key being located on the server and the private key being stored in a file on the local PC).
This is not a Toad issue. For information on creating and installing keys please consult your SFTP/SSH server documentation.