Some Additional things:
When you fire up Sigil-0.9.3 for the first time:
- navigate to the new General Preferences and select the default epub version you plan to work with (epub 2 or epub3) so that new empty ebooks start with the correct code.
- If you plan to work with epub3 epubs, you should change your PreserveEntities setting to use ONLY NUMERIC entities. For example use & # 1 6 0 ; for non-breaking spaces and etc.
- We strongly recommend enabling Mend On Open
in your settings as well for best performance with Sigil