Reply To: You have invalid or expired license key Home › Forums › Front End PM PRO › You have invalid or expired license key › Reply To: You have invalid or expired license key February 9, 2018 at 3:40 pm #10857 fadechaParticipant I did it , and the error is still there. I started with a first website ( for developpement) for my license, then I swtich. I installed the Version 6.4 for the plugin, my wordpress is 4.7.9. and I’m in php 5.4 (i know it’s old…)