When I try to open all templates: Insert>Page Templates>Page Templates to get the Templates sidebar in OneNote, I get bupkis, nada, nil. I've tried the fast repair of Office, the online repair of Office, restarted my PC, bupkis!
I have my life tied up in OneNote... all my book stuff, and most especially all my reviews that number close to 1K. Please don't tell me how stupid I am to rely on this old (and apparently never really updated) software. I have a subscription to Microsoft 365, so I really don't want another subscription. However, if you can suggest another flat database that will allow me to transfer my OneNote data to it, I'm all ears.
I have a Dell Optiplex with an Intel Core i7-8700 CPU, 32 GB RAM, 64 bit, running Windows 11 that has all updates installed.
Before using OneNote, I used Evernote. In checking it out now, I find it to be a bit pricy for this retiree.