This information applies to the latest version
Nik Perspective, also known as Perspective Efex, has been removed from Nik Collection 7. Those upgrading and needing Nik Perspective are encouraged to retain their previous version to use in parallel.
If you are looking for an alternative, DxO ViewPoint provides all the features of Nik Perspective, with additional improvements planned. This advanced tool offers users optimal compatibility with Adobe Photoshop and seamless integration into DxO PhotoLab.