DxO typically allows users to activate the software on multiple personal computers (usually up to three), provided they are not used simultaneously. If you upgrade your computer or switch from a PC to a Mac, you can manage your active seats through your DxO account dashboard.
If you have lost your key, you do not need to purchase a new one. Simply log in to the "My Account" section on the DxO website to retrieve your license information and download history. The Risks of Third-Party Key Generators Color Efex Pro 5 Activation Key
Activation: When you first launch Color Efex Pro 5 or any other plugin in the suite, an activation window will appear. Enter your key exactly as it appears in your email. DxO typically allows users to activate the software
Installation: Download the Nik Collection installer from your DxO customer account. Simply log in to the "My Account" section