SOLVED !

There never was such option. Opera Chromium used to import settings from Opera Presto automatically, don't know if it's still the case.

You were completely wrong! I tried installing older versions of the new Opera and it turns out that most of them support importing Opera 12.x profile - from within the "Import bookmarks and settings" as well as upon the first launch.

Here's the proof:

So, what I eventually did, was installing Opera_41.0.2353.69 (which imports Opera 12.x profile automatically), and then perform auto-update to the current stable version. All passwords and all bookmarks got imported. Brilliant!

why don't try Bookmarks Import & Export add on, pls read it can help you https://addons.opera.com/vi/extensions/details/bookmarks-import-export/?display=en

I'm more concerned about passwords - bookmarks can be imported via HTML.

Did you install Opera 47 as a standalone (USB) installation?
IIRC it does not import data if you install it like that.

No. However, I used offline installer - the file was named Opera_47.0.2631.71_Setup.exe and installed into c:\Program Files (x86)\Opera Stable. I can try the regular/online installer - OperaSetup.exe, but I doubt it'll help...

There never was such option. Opera Chromium used to import settings from Opera Presto automatically, don't know if it's still the case.

That's exactly my point - this automatic import gets mentioned in this forum a few times, but I guess it's been removed... sigh.

https://forums.opera.com/post/80565
https://forums.opera.com/post/60680
https://forums.opera.com/post/93277
https://forums.opera.com/post/30223

For bookmarks you should be able to export them as html in Presto and then import im Opera Chromium.

For passwords, I can easily export old Opera's wand.dat to plain text. I guess I need to find a standalone tool that can inject them into Chromium's Login Data file...

Hello,

I am trying to import bookmarks & passwords from my existing (working) instance of Opera 12.18 to a brand new installation of Opera 47. They were not imported during the installation process.

Reading forums, I was under impression that "Opera 12.x" item would appear in the "Import bookmarks and settings" section. Unfortunately, it is not the case:

I tried reinstalling Opera 12.8 in the default directory as well as installing the x86 version - no luck.

Later, I read that launching the new Opera with the following commandline would perform the import:

"C:\Program Files (x86)\Opera Stable\launcher.exe" --with-feature:import-presto-profile --presto-small-prefs-dir="C:\Users\Michał\AppData\Roaming\Opera\Opera\"

...no success, either. I am starting to suspect that this feature might have been removed? When I type in:

opera://flags/#import-presto-profile

it is not there:

However, "password import and export" flag is enabled:

Any idea what's happening?

PS. Just in case - my Opera 12.18 paths: