thank you very much for your hint:
For your particular Passwords problem, you could use the NirSoft Chrome Pass dumper, then type each one in Opera and sync or use any Passwords Manager and they will be available in any browser and device (Cloud/Extensions/Mobile Apps).
First I thought WebBrowserPassView already has the passwords included, but I was wrong.
Since I still have the old Windows Installation on a HDD connected internally to my motherboard, I could recover ALL of my passwords from my old User Profile! Now I only have to save and format the password list to a comma-separated file and import it with Opera.
For anybody who wants to recover passwords from another Windows installation or User (or backed up profile folder), follow these steps:
What you need prior to recover your passwords:
A previous or current Windows installation
Your User Password for that Windows Installation
Your User Folder for that Windows Installation
Download and open ChromePass
Press F9 or go to File > Advanced Options
Select the option "Load the passwords from another Windows user or external drive:"
Enter or select/browse for the User Profile path, e.g. E:\Users\John
Check the option "Advanced external drive settings:"
Enter the path for the Windows Protect folder from this user, e.g. E:\Users\John\AppData\Roaming\Microsoft\Protect\
Enter the path of the Opera Profile folder, e.g. E:\Users\John\AppData\Roaming\Opera Software\Opera Stable\ or F:\Backup\Opera Profile\
Click OK and wait! It might take some time if you have huge number of passwords.