Cannot share after latest update to Ventura

It seems that after installing the latest updates to Venture: 2020 iMac, SSD, macOS 13.5, there is a problem with sharing on my iMac, but not on my wife’s 2019 MB Air, also running macOS 13.5.

This first screenshot is of the top, right-hand corner of Safari, with it’s Share icon.

Previously, when reading an article in the NYT, in Reader view, when I clicked on that Share icon it produced a share “list” that had the Safari icon next to [Email This Page].

The icon has now changed to the Brave icon.

I went back to Safari as my default browser and restarted, but nonetheless, the Brave icon is still there and clicking on[Email This Page] simply brings the Brave browser forward with the most recent page showing, not the page I was trying to email.

In the next attachment is the next thing I noticed:

This is what was produced when I right-clicked on a .jpg on my desktop.

Previously the choice to email any item was offered when I right-clicked:

When I go to [Edit Extensions] at the bottom, this is what I get: Mail is associated with the Brave icon and not the Mail icon as it is on my wife’s computer.

I rebooted in Safe Mode: same problems persisted

Booted normally again: same problems persisted.

Might this be some corrupt preference? If so, any guess as to which one??