Sigil 1.0+ got rid of the strict enforcement of the "Text", "Images", "Styles", "Fonts" folders.
(You could sort files back to Sigil's old way by going under
Tools and clicking the new menu item.)
See the 1.0.0 changelog:
- The BookBrowser will still show the Text, Images, Styles, Fonts, Audio, Video, and Misc “folders” but these are now “virtual folders” that simply organize the existing resources by type but do not restrict their actual location within the epub.
- A new Preferences setting has been added to the Appearance Preferences that will determine if the book folder relative path will be shown in the BookBrowser or its shorter unique name (filename) will be used instead. In either case, the BookBrowser tooltips will always show the file’s true book folder relative path. Duplicate file names (in different subfolders) will always show the longer path to be able to differentiate between them regardless of the new Appearance Preference.
- A Tools menu item has been added to standardize any epub already loaded to Sigil’s old structure