But it still left behind 70 invalid registry entries, most of which I found and fixed with EasyCleaner (another excellent freeware utility), but there's still a dead "Edit with . . ." link on the right click pop-up menus for all my *.htm and *.html files, so I think I'll have to fix that one by hand with regedit.exe. What a mess.
I also had another "get acquainted" session with the two programs competing to replace it, Arachnophilia and HTML-Kit. But I'm just not at all attracted to either of them, so I think I'll still be scouring the personals for better software companions for quite some time.