Developer reply by Mime Čuvalo
Rated 2 out of 5 stars
Seems like the new version has some problem/bug. All my accounts using SFTP (with private key) are not able to connect.
Switched back to 2.0.26 - it's working.
This is fixed now in the latest version. Sorry for the inconvenience.
To create your own collections, you must have a Mozilla Add-ons account.