If you’ve purchased DaisyDisk in the App Store, you can migrate to the more powerful stand-alone version, free of charge.
It seems that your free license was already redeemed before. You can search for an existing license by your email address, or contact support.
DaisyDisk is a desktop app, so please open this page on your Mac and proceed from there.
Alternatively, email us a proof of the purchase and we’ll migrate your license manually.
Before you begin, make sure the App Store version of DaisyDisk is installed on this Mac.