Old password removal safety

Question
As password manager will be end of life and dissapearing by the end of the month (February 2025) what is the safest option.
Firstly export to the web based extention new password manager (tick done).

Just let avast close and remove all our passwords in the UI and hope they are gone forever.
OR
delete all manually so as to know they are defo gone.

Which are you going to do?

Not trust any password manager.

How do you know that even if you manually delete passwords, there isn’t a copy somewhere?