How do you assemble 2 years of important bookmarks and not keep your own backups of such important personal data?
That asked, it might be helpful if you provide a better timeline sequence of details of what you did or were trying to do before and when the problem occurred, beginning with the Opera version and OS you were using at the start, what specific steps you took with it, and what the results were.
Opera doesn't auto-update their new Opera versions (eg: 33) with old Opera versions (eg: 12.16) - the capability's not even built into their systems. If you updated from the old to the new Opera versions, however, your system will still carry the old Opera version unless you've deleted it. So perhaps what you're seeing is not what you think you're seeing...
