Select a sticky note in Notezilla, right click on its title/toolbar and choose Send To->Computer from the menu. Following 'Computers' window will be displayed. To add/edit computers, click on 'Manage Computers' button.
Now, click on 'Add Computer' button and proceed with the steps shown to you.
Similarly, you can edit/delete computers, edit/delete groups from the 'Computers' window shown above.