@blackbird71 Opening/closing has nothing to do with the creation of these files. I booted up about three hours ago and then launched my Opera browser, I did not open and close the browser multiple times, I opened it then started surfing the Internet. in three hours Opera created three of these files:
03/29/2018 04:44 AM 1,857,024 Opera_installer_180329084401885.dll
03/29/2018 05:06 AM 1,857,024 Opera_installer_180329090644175.dll
03/29/2018 06:12 AM 1,857,024 Opera_installer_180329101254337.dll

@donq Yes, I agree - a bug. Sure, it is easy to delete these unwanted files out of the Windows temp directory but why should I have to and why do I receive 10, 20 30 of these each and every day? The browser is already installed, A nasty bug that needs to be corrected.

Thanks - found the "Never Saved" list.

At some point when accessing a certain website, I replied "No" to the question if I wanted to save the password. Now I want to save the password for this website but am no longer asked to save it. I tried "Settings->Privacy and Security->Manage Saved Passwords" but this does not give me the option to ADD to this list. I am using Opera version31.0.1889.174.

Any ideas on how I can add a password for a specitfic URL that I previously said "No" to?