OneNote Gem Add-Ins

Question:
Every time I click a link onenote:, Windows 10 always opens it with OneNote UWP, and how can I open the onenote: link by default with OneNote 2016?

Answer:
You can open the default app at Windows 10's Settings, modification onenote: Protocol to set its default app as OneNote 2016.
 
Step:

1. Open Windows 10 Settings.
2. Apps
3. Default Apps
4. Scroll to bottom, click “Choose default apps by protocol”
5. Find
   OneNote
   URL: OneNote Protocol
6. Change default app to OneNote 2016