If you want to send the Windows sticky note to a person not having account/software Notezilla , then you must use the "Send To Contact" option and add his email address. Then you can send the note so that it is received as email.
If you are sending the note directly via local network, then Notezilla must be installed on the other computer. Meaning, if you use the "Send To Computer" option.
Watch this short video for more clarity: