Hi keerthiseelan,

Yes, each of our licences has unlimited number of sub-domains for activation.

You can also easily switch the activation to another domain, if needed.

- If you need to switch domains at any time;

You can either log in the 'old domain's'  website WP-Admin, go to our Plugin settings/Activation, and hit "deactivate" button there;

And go to the new site, log in our Plugin there, in the Activation settings just paste your Purchase Code, and the licence will be switched to that domain.

-

Or, you can deactivate the domain through your Store Account like this :

 In our store you can go to "My Licenses" and click on the "Manage Domains" button:

From there, you will be able to deactivate the old domain (while it's still active), and then simply activate the new domain in wpDataTables settings/Activation, once you move the site.

And i just wanted to point out that you can try wpDataTables before purchasing

 on our sandbox Demo sites ( you can find links for the main plugin Demo,  

as well as add-on Demos, in my signature),

and there is a 15-day money-back guarantee period, 

so if you purchase the plugin, you can safely fully test it out, and if it doesn't fit your needs you can request and receive a refund in that period. ( same goes for all plugins and add-ons)

Let me know if you have any additional questions.