Where can I buy a license?
If you are purchasing an app such as MarsEdit that is free to download from the Mac App Store, you can purchase a license in the In-App Purchase window, which can be opened from the application’s menu in the upper-left corner of the Mac screen.
How do I recover a lost license?
If you purchased from the Mac App Store, Apple handles all licensing of the application. Just make sure you are logged in to the same Apple ID that you used when you made the purchase, and re-download the app from the store. If you are using an app such as MarsEdit that offers in-app purchases, you may then need to click the “Restore Purchases” button in the In-App Purchase window to completely recover your license.
How do I unlock the app with my license?
If you purchased your license from the Mac App Store, there is no registration code, but your purchase is managed by Apple. When you download the app on a new Mac, or click “Restore Purchase” from the licensing window, Apple provides an up-to-date proof-of-purchase which includes information about any licenses you have purchased.
Can I unlock the Mac App Store version with my registration code?
What if the app doesn’t accept my registration code?
If you’re running a directly-downloaded version of one of our apps, you should find a Registration menu item in the menu for the name of the app, in the upper-left hand corner of the Mac’s screen. Open this window and enter the registration information to unlock the app.