[jackie_w]

@stumped,

I don't use Sigil very often so I replaced it with the non-installed SigilPortable. But as you can see in post #1 I didn't have any problem getting SigilPortable to appear on the right-click OpenWith list without any need to have to always access it via browse more apps. The problem I'm trying to solve is my inability to get calibre's viewer and editor to appear in that same right-click context menu list.

Originally Posted by PeterT

See https://softwarerecs.stackexchange.c...a-default-apps

The tools from NirSoft are normally excellent options. See http://www.nirsoft.net/utils/file_types_manager.html

Thanks, Peter. I do have the NirSoft FileTypesMan utility but, in post #2 BetterRed, says that it may not work anymore.

I'm even more nervous about making changes with potentially out-of-date software than I am of doing manual registry edits. At least I can un-pick things I've changed manually

Anyway, I think I may, finally, have found a promising google link. If it works out I'll post more later.