No license files found (note, license files must have a ".txt" extension)
If you try to cut and paste the license and test it that way you get the following error:
Unable to install the certificate. Please obtain a valid license and try again.
This would correct the license count shown although future licenses additions would still result in the same error.
Note: Upgrading to the latest build of NS SP3, which was the latest release when this article was published, resolved the issue.
NS 6.0.5287 (SP2) with Hotfix 19