Core FTP Site Manager
Open Core FTP and open the Site Manager. Add a new site and give it a name. Enter your IP address or domain name into the Host / IP / URL field.
Next open the Advanced properties
Navigate to the SSH section and check the box next to Use Putty compatible SFTP. (This is the most important step. Otherwise you will get an Aplication Error SFTP connection error)
Set the Port to 2222 and make sure the connection type is SSH/SFTP. Hit connect.