[BeckyEbook]

I have some suggestions.

Let me list them below:

* Adaptation to Sigil 1.x
This should not be difficult, first of all you use an additional condition will detect whether this is version 0.9.991+

if bk.launcher_version() >= 20190927:

Next

bk.group_to_folders("Text")

and you get the path to the folder with Xhtml files, and

bk.group_to_folders("Styles")

gives you the path to the folder with styles. Then you only replace the harcoded in several places "Text" and "Styles" to variables.


* Additional options for names used in names of ids, files and styles (just as you can change FNID), it is worth giving the option to change:
class FNOTE
id FOOTNOTE
class Footer
name in footer FOOTNOTES
class Footnote
filename Footnotes.xhtml

It will be a nod towards non-English users

* Option to enable/disable the fragment with the footer (currently the footer is always added, although it is not necessary after all).

* The plugin does not take into account the situation when the file name is not necessary if it applies to the same file.
Then

<a href="../Text/Section001.xhtml#fnid1">

is saved in a shortened form:

<a href="#fnid1">

... and in this situation Reinstate does not work.

* It is true that it is dangerous when it is used on a file with errors, so I would add at the top of the plugin window such a bold inscription "Always work on a copy of the file – you may lose many hours of your work!"

Edit:
* Add the option to enable/disable adding epub:type="noteref" and epub:type="footnote"
Look here.