.NWELICENSE File Extension
What is an NWELICENSE file?
License referenced by Nisus Writer Pro, a rich text word processing program; contains the license verified by Nisus Writer Pro in order to use the application beyond the trial period; includes the owner name, type of use, and expiration date of the license.
To view your license(s), select Nisus Writer Pro → Licenses.... In the dialog box you'll be able to view your license(s), buy a license, or enter your license.