Hi, been using Sigil for quite a while, but just now registered to the forum.
I have two feature requests at moment (more later

)
Would it possible to batch rename several selected files in the book-browser window.
E.G.
select several files then right-click, have an option - rename all, which then opens a string for the rename and one with a digit, then renames the files in order. So if given 'Chapter' and '4' the files would be renamed 'Chapter4.html' 'Chapter5.html' 'Chapter6.html' 'Chapter7.html' etc.
The second request is to have in the search/replace dialog box, to also have an
'insert symbol' button, which allows to insert for example CR+LF, or the regex commands for a single character or digit etc. , which would make regex s&r easier.