As I indicated earlier the Nik applications can be run standalone if one is knowledgeable and comfortable enough to drill down to the application executables using the computer’s file manager. Many, if not most people, may not know how or want to do that. Additionally, while most of the Nik applications have a file menu when executed standalone, some do not.
My point however was that the Nik Collection is not designed with an easy to use common interface that can run the various component programs. That is a minimum expectation for a software application intended to be run standalone. To tell someone that their Nik programs can be run standalone presumes a level of understanding about how to navigate their computer file system that unfortunately most people just don’t possess. It would also be easy for someone unprepared for the experience to accidentally move, delete or rename one of the executable programs. This is not for everyone.