Old licenses can be still used the way they are.
http://www.dotnetpanel.com/dotnetpanel/faq/i-m-an-existing-customer-how-would-new-licensing-scheme-affect-me/
Rubal Jain // Email - Rubal @ Rubal [dot] Net
Windows Server Setup, Configuration, Troubleshooting, Basic Security & Hardening
DotNetPanel - Helm Control Panel Setup, Installation, Configuration, Troubleshooting
Authorised DNP Reseller.