I had the same problem, and it was very annoying...
Here is what I do to fix that :
Removing Opera in the software manager
Showing the hidden folders in the file manager (Ctrl+h).
Searching for any folder named "opera" and deleting them.
Connecting to my Opera Sync account to restore my passwords.
Is there some feature you would love see added to Opera browser on computer? Let us know!
@soggow U simply just changed my online life, cause it annoyed me too much having lost that yo>>TAB shortcut, but, now?? I'm adding every main database and forum I use to consult (which I do a lot) for gaming and studying and I feel much more "powerful"(?) and enjoying my time. Like a dead ex, I'm completely over yo>>TAB thanks to you.
@seikushim One of the options in Delete Private Data is to delete passwords - you need to make sure which options are selected before you tell it to go ahead.
You could check in your profile folder to see if the backup copy was cleared too. If it looks like it contains meaningful data, copy it somewhere safe. The file is named "Login Data" for the original, the backup probably adds ".bak" or ".old". After closing Opera you may be able to replace the original with the backup.
If there is no such file, the only other hope would be if you have another computer that hasn't connected to Sync since you deleted everything. Delete Private Data isn't supposed to be something that can be undone.
Go to opera://about and take note of the path to Opera's profile directory
Open Windows Explorer and go to Opera's profile directory. Pasting the path in the address bar should lead you there
Find a folder called Storage and delete its contents
Do the same for a folder called Sync Data.
Start Opera and try to login to Sync