In order to delete notes on Notezilla.Net, you will need to delete the Notezilla.Net account first.
Please ensure you are using Notezilla 8.0.23. If not, you can download and install the latest Notezilla from our website http://www.conceptworld.com/Notezilla/Download
After you reinstall and run Notezilla , right click on Notezilla icon, choose Sync and then go to Account Settings and choose the Delete account option. Proceed with the instructions to delete the account.
After you have successfully deleted the account, right click on Notezilla icon, choose Sync option and re-create the account to sync existing notes from the desktop.
You can watch this short video for more clarity:
Note that your other computers and devices may have been configured to sync with your old account. If it is a phone or tablet, uninstall and re-install Notezilla app and sign into the account that you created just now.