[Bob Doyle]

I uploaded my PDF to Calibre.
I generated AZW3 and Mobi.

I then went to Edit Book from Calibre

I made many changes in Book Edit files, part0000.html, part0001.html, etc. I saved many times in Edit Book.

Back in Calibre, the files have not changed. Mobi, AZW3 are still the original versions.

How do I update my Calibre versions?

Also, when I try to upload files to Amazon KDP, they let me upload Mobi, but I cannot select ASW3 for upload?

Thanks in advance.
Bob