Pro bought inside the Mac App Store build belongs to your Apple Account.
- Sign in to the Mac App Store with the Apple Account you used to buy Pro.
- Install dux from the App Store.
- Open dux Settings and choose Restore Purchases.
Moving to the direct download
Pro bought in the App Store also works in the direct download on the same Mac. There is nothing to type: dux finds your App Store purchase and sets up a license key for you. Open the App Store version once after buying, then open the direct download, and it shows Pro. dux needs to go online once within 14 days to set up the key. The steps.
Refunds for App Store purchases are handled by Apple at reportaproblem.apple.com. Purchases from the direct download are covered in License keys.