I unintentionally started a topic about this up in the SonarX forums. It appears you have 15 days AFTER you register your version of essentials Melodyne that came with your X3 upgrade, to upgrade to Celemony's Editor version for half price or $149. I can't vouch for sure, but from the other replies, the time dependent is WHEN you first register. In most cases then, along with the X3 upgrade cost, you end up getting Editor, still at a lower than retail price than if just buying it separate....AND the X3 upgrade, along for gravy...or the other way around.