If you had already created Notezilla.Net account and synced few Windows sticky notes from one computer, then, on the other computer, to set up, you will need to sign in and download the notes that you had synced from the first computer. Once you do that, both computers will sync automatically every minute. But when signing in, any existing data will be deleted. You can export those notes in a file using File->Export option (from Notes Browser), proceed with Sign In and then import those notes using File->Import option (from Notes Browser).
Once each computer is setup, any note you create on one computer will automatically sync in a minute and appear on other computer.