I've seen this answer, but this doesn't solve the problem honestly, i'm posting hoping there is a better different answer, or someone out there to help.
I even have a full backup of all files and folders of opera from the previous OS installation, where i actually recovered my (speed dials / bookmarks), but still can't seem to find a way to recover passwords.
Even using a third party software which i found a bit helpful, showing sites of where i had my passwords saved and "username" used, but no passwords either!
Looking forward to hear something more helpful, that might help others too.