I deleted books to change their titles and I the highlights aren't showing up

Hi.

I wanted tot change the titles of some ebooks I have on my Kindle using Calibre. I did it using this "guide" https://smallbusiness.chron.com/inst...ter-68306.html however I lost all the highlights and annotations.

Luckily, before doing it, I made a copy of the My Clippings files in txt format where all the notes are.

I tried to edit the titles in the txt files with the find-replace function and put it back in the Kindle root folder but doesn't change. Maybe the dates and orders affect too.

Please I'm completely lost and I need help asap. Thanks.