No index with Chat GPT History Download. How to add an Index

I downloaded my Chat History hoping to find that easier to navigate. But I had over 60 chats and the history does not have an index. So I worked with GPT 4 Pro to develop a modification to the scripts in the html file to add an index.

I have put how to add the changes here: Github Grayerbeard GPTchathistory - Add Index