According to the Envato Market's policy, one license means it is only valid for one domain. If you wish to use NeuronThemes on another domain you would need to purchase another license. Running one license on multiple domains is against the regulations and is strictly prohibited.
If you are trying to use the NeuronThemes license on two or more domains you will be notified with the following message.
"According to the Envato License Terms, you have exceeded the maximum number of activations permitted for a single Purchase Code. Please purchase a dedicated license."
