Thank you for a potentially very useful plug-in.
I cannot test ssh2 until I have converted my Vandyke style private key to openssh.
But I did try using your plug-in as standard ftp & it did not accept my user/password, though the same combo works fine on FileZilla etc.
If you can fix standard ftp then at least I can use your plug-in with standard ftp until I get the corrected format private key.
Installed the plugin via the blog browser upgrade btw, automatic, said it was v1. Installed fine and activated fine but ftp didn't work.