[Users] Editing entries in "Open with" menu

[Arthur Knight Hammer]

Greetings! OpenSuSE 12.3 Claws-mail 3.9.0

I have some bad entries in my "Open with" menu when examining
attachments and I would like to remove or edit some of them.  I've
noted that I can add entries but can't edit or delete them.

I read the FAQ about mimetypes and tracked down several OS locations
for where these items supposedly exist, but none of these locations
have the erroneous entries nor anything that looks like the list I
have.  There isn't anything in .claws-mail or many other OS folders
that I can find having done a recursive find/grep for a string
contained in the menu.

I would be most appreciative if someone could point me to the location
of this elusive set of entries!

Thank you!

*
Arthur Knight Hammer