I want to rid my Opera Browser of Amazon Assistant, I followed the Instructions on Amazon site on link below but the Amazon Assistant does not show on extensions

I do not want Any adware in Opera, no trackers, no ad or analytic, just private browsing.

I unpinned the Amazon assistant and it came back on next session

What files need editing to rid my system if this Amazon trojen?

I do not mind if I had to edit the registry, but I would rather opera just respects my choices in settings, i.e.

Display promotional notifications
Receive promotional Speed Dials, bookmarks and campaigns

Both Disabled

https://www.amazon.com/gp/ubp/misc/uninstall/instructions.html

How to I get rid of this tripe Amazon trojan