You can connect wordpress one-click install, via ssh port 22 using your (private & public) key method .
Hi, i'm also struggling with this issue.
Through SSH i connect with my droplet terminal, no problem.
For uploading files, Filezilla, no problem.
Installed the WP ssh-sftp-updater-support plugin, but i won't let me in.
Slightly confusing terminology, tried both: FTPS / SSL or SSH2.
I won't let me FTP to my Droppy.