How do you make the Read-Only notes editable in new OneNote edition version?

​Question:
I have re-installed Windows system, downloaded and installed OneNote from onenote.com. The pages cannot editable when I open my local .one files? How to change them to editable?

Answers:

It is the free edition OneNote download from onenote.com. This edition OneNote has some limited. Special for local notebook.

•     Free edition OneNote cannot create local notebooks.
•     Free edition OneNote can open .one file, but It cannot edit local .one files.

If OneNote suddenly opens everything as "Read-Only" that usually means that either you haven't activated the Office or you're using a Trial version of OneNote that has expired. 

Solution:
Purchase Office 365, and install the Office 365 from your Microsoft Account web page. In this edition OneNote version, you can create, open and edit local notebooks.