DxO acquired the Nik Collection in late 2017. They released Nik Collection 2018 and subsequent versions, which returned to a paid model. In the DxO versions (often branded as Silver Efex Pro 2 but within the Nik Collection 3, 4, 5, or 6 bundles), the activation process is streamlined. You usually activate the software via the DxO account portal or a central activation tool, which handles the Installation ID process in the background.
They will provide a corresponding to unlock the software. Common Installation Issues Installation Id Silver Efex Pro 2
panel, which emulates traditional darkroom printing on fiber-based papers. Paper Toning DxO acquired the Nik Collection in late 2017