Well there is no any official steps about the notification regarding to renew your license or the status of the license key, if insist then follow the directions instead.
I have installed Panda 2019. Really I have in mind for a moment try other antivirus but the insistence of this Pop up (all 20 minutes!!!) I have make click and suit the procedure for renew. The installer of new version tell me that being necessary uninstall previous version "do you want to uninstall?" Ok. Uninstal. Restart and install new Panda version. But the Pop up continues f...k..ng my work time.
Last opportunity: If you have not a solution for me (tanks in all case) I go uninstall and remove all Panda elements.