Will a v19 License Key work on a v18 Installation? - Parallels Forums
: A full license key can be purchased from the Parallels official site . After purchase, the 30-character key is sent via email.
: Current students and faculty are eligible for a 50% educational discount on Parallels Desktop Pro.
: If you own a license for a newer version (like version 19 or 20), that permanent license key may also activate version 18.