NS1 was added to the Waves v9 bundle September 13, 2012.
If your Waves v9 was authorized before that date, but you installed v9 after that date, your license will not have the authorization for the NS1 plugin.
If your Waves Update Plan is still current, do the Version Update from your Waves account to get the updated license.
If you’re not under the Waves Update Plan, you can remove the NS1 from:
Mac: Macintosh HD/Applications/Waves/Plugins
Win: C: Program Files/Waves/Plugins