Glo Remove all annotations

Hi, all.

I tend to make a lot of highlights and annotations as I read, to mark typos or poorly formatted parts of the book. Depending on the quality of the ebook, I might end up with 10+ pages of highlights by the time I get around to fixing them in Sigil, and its a real pain to have to remove them afterward one by one.

I've also noticed that I can remove a book from my Kobo, and when it is re-added to my library after fixing, the highlights and annotations will still be listed, even if the highlighted block of text no longer exists! I assume the kobo simply remembers a position in the ebook and saves the text to the annotation list, but I don't know where it is this information is saved.

Is there a file on the Kobo that stores the annotations and highlights, that I can remove or edit to quickly get rid of all (or as many as I'd like) highliughts and annotations for a book?

Also, out of curiosity, how are the annotations ordered in the ebook? I find that if I remove one highlight within the ebook, the rest will "shuffle" seemingly at random. I would have thought they'd be ordered as they appear in the book, or by date of the highlight, but it doesn't seem that way.

Thanks in advance for any help.