If you cannot see your notes in Nebo always check to see if you have been signed out of your MyScript SSO account. During an update, Nebo may sign you out of your MyScript account and you will no longer be able to see your notes in your Nebo app. When this happens please do not restore the app or uninstall and reinstall it as this will automatically delete all related .nebo files from your device and your cloud account. Sign back into your account and your missing notes will return to Nebo.
If your notes are still not visible in Nebo after signing back into your MyScript SSO account please contact Nebo support here.