Downgrad to 2.0.5!!! Rated 5 out of 5 stars
2.0.6 does not work! FTP-accounts have disappeared! Waiting for fix!
PS: Version 2.0.7 works perfect!!! Thank you very much!!!!
Sorry for the bug in the first place. It is fixed in the next version (2.0.7) which can be found here: https://addons.mozilla.org/en-US/firefox/addon/fireftp/versions/
(until it is officially reviewed by the Mozilla add-on team)
I appreciate your patience and understanding with the bug - sorry again for the inconvenience.