This will not work with the Mac App Store version.
If you are using the version from our website, you can enter your Fantastical 2 license by clicking 'Fantastical' in the Menu bar > Enter License. If you purchased Fantastical 2 for Mac directly from our website (you have a Fantastical 2 license code) then you need to download Fantastical 3 directly from our website. Otherwise Fantastical will not unlock your Fantastical 2 features. Mac Users: In order for Fantastical to activate your prior purchase you need to download Fantastical from the same location you originally purchased it from (either directly from our website or the Mac App Store). This only applies to existing Fantastical 2 customers. All of your features from Fantastical 2 are automatically available and do not require a Flexibits Premium subscription.