@burnout426 so i did all actions your mentioned in your comment. Now what we have:
- installed portable Opera_60.0.3255.109 on desktop
- launched, installed ublock origin
- relaunched, ubl still there
- copied to pendrive, launched from it, ubl still there
- take pendrive to another pc, launched from pen drive and voila - ubl is gone, folder of ubl (like "qiueroiuqweyroiqwyeoir") is flushed in that moment.
So the point is launching on pc where it was not installed by installer.