- Opera Help > Find solutions.
You will find where your profile it's located and the files you would need to back up.
In case of any Sync problem or file missed or not checked to Sync, you will find all your stuff there.
If you still can open Opera, try to export the extensions settings - if they allow to do it -.
In case you save passwords but do not sync them, ask on how to export them.
Also, take this on count.
Windows 10 (x64) | Anniversary Update
Opera Stable · Beta · Developer
Thanks; I don't use Opera to save passwords prefer to use dedicated manager for flexibility.