Hello,
Welcome to Microsoft Community and appreciate your time taken for sharing detailed information. I understand that OneMore Add-in for OneNote. could share with you some of my thoughts on this issue.
This add-in is designed for OneNote. Because it's not a Microsoft product, we can't guarantee that it's secure, but this add-in is available on OneNote. It gives you the ability to clean text, manage custom styles, syntax highlighting, merge or split pages, create custom labels, bidirectional links, and more. But to use it, you still need to meet certain conditions.
- Windows 10. If you use Windows 8 or 8.1, ensure that you have installed .NET framework 4.8.
- OneNote 2016 or later (32-bit or 64-bit).
Feel free to post back if you need any further assistance.
Best Regard,
Kevin | Microsoft Community Support Specialist
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