This plugin allows you to launch external applications for editing your books in Calibre.
Common uses are to allow editing a specific format of a book in an external editor (such as to edit an EPUB in Sigil), or to edit the cover of a book in an external graphics program to crop/resize it.
For more information, see the Wiki
All kiwidude's calibre plugins are now developed and maintained in GitHub at:
Please see the README.md and CONTRIBUTING.md at the above site for more information.