You can select an authentication method to ensure that you are establishing a connection to the correct server, provided you have chosen SFTP as the connection type.
Click the Tools menu and select Site Manager to open the Site Manager dialog window.
Select SFTP as the connection type and click on Advanced to open the Authentication Method dialog window.
You can choose Password and/or a Public/private key.
Select Both if you want to use both methods.
If you select Password, your FTP password will be used.
If you select Public/Private key, you can select a key file below and enter a password, with which this key file will be encrypted.
Click OK to close the dialog window.