You don’t need to connect internet in order to use our plugins. Also you don’t need to use iLok / Dongle for the registration of the NoiseAsh plugins too.
Just download the package on a machine that has an internet connection. Then copy the downloaded zip package to the new computer and apply the installation and activation. Activation is done with in the plugin without connecting internet.
To learn more about Activating the License, please wathc this Quick Video Guide.