Realizing that the original 13-digit alphanumeric codes were replaced by a different system under DxO.

There are many benefits to using Color Efex Pro 4, including:

If you lost it, log in to your customer account on the DxO website. Your keys are stored in the "My Software" section. 2. The Legacy Version (Google Nik Collection)

You can buy a lifetime, subscription-free license directly from the DxO Website