Few suggestions to improve

1) Html export file naming is bad. Contains just export date. If you export dozens of chats then how to remember which is what. You need to manually rename them because of this.

Suggestion: ChatGPT has named all chats. Use that chat name as part of the exported file name.
E.g. if your chat name is "export chatGPT chat to local disk" then use "export chatGPT chat to local disk.html" or "export-chatGPT-chat-to-local-disk.html"

2) Html export loses all formatting of the original questions in chat. If question contains chapters, formatting, empty lines, bullet lists etc they are lost and question is one huge chapter of text.

Suggestion: Keep the original formatting as much as possible also in html export.

After fixing these I'm happy to try again and give 5 stars.