depending of operating system and Thunderbird version it might be preferences, options or settings used to label the menu item you are looking for.

Matt: I knew what I sought would be in something like "preferences, options or setting," so that did not help. You did inspire me to continue my search. After finding saved passwords in a path that is now irrelevant, I discovered I was many versions behind the latest. I was at 68.12.1. I updated to 78.14.0, then to 91.13.1, and finally 102.6.1., where I found passwords at menu(the three horizontal bars) / settings (not to be confused with Account Settings in the same sub-menu, Argh!) / Privacy&Security. When we try to help others we should start by saying migrate to the current version, then we will talk. In the case that users are stuck in some older version, then we can help with that version. But thanks anyway. I was enlightened.

Actually the only version of Thunderbird supported is the current release. There may be an overlap as it can take some months for everyone that is going to move to do so, but basically if your not using a current release version or the last release for the first few month after the new release than you are using unsupported software.

Thunderbird forces update notifications for that reason. Some folk have taken it upon themselves to invoke enterprise controls to stop the prompts, but basically the software does it's level best to ensure folk are using the latest version. Hence unless a topic is clearly for an unsupported version the current version will be assumed. See https://support.mozilla.org/en-US/kb/updating-thunderbird

Likewise folk here assume the use of windows unless specifically told in the request it is not windows. Those using Linux and Apple amount to less that 5% of Thunderbird's users.

I might also point out you said you downloaded Thunderbird on the 8th January. The web site would not offer an old version (68). The download button on the web site https://www.thunderbird.net/en-US/ gets your operating system and the need to a 32 or 64 bit version as well as language from your browser and offers the latest version for your operating system and language. I must therefore assume you did not download from the official site. I suggest you never download Thunderbird from any other site.

The version from the Thunderbird web site is packaged by the Thunderbird development team and they guarantee it only contains Thunderbird. That can not be said for downloads from elsewhere.