When you Hightlight in ADE , it will get saved automatically. Those information is saved in C:\Users\<USERNAME>\Documents\My Digital Editions\Annotations\<FILENAME.epub.annot>
Thanks for that. How do I then open the file? My computer doesn't seem to recognise the file type, it asks me what to open it with and when I select Adobe Digital Editions nothing happens. (I'm on PC.)
Actually, it just opened but there are no highlights on it! I've lost a whole day's work. How do I make sure this doesn't happen again?