Hello,

Directly upgrading to Lifetime licenses is not possible, but we can help you do this easily.

You can acquire a new license and receive a partial refund for the previous licence. 

You would need to purchase a new Lifetime License and reach out to us through a ticket, posting both purchase codes in a PRIVATE ticket, and our support managers will refund the amount of the originally purchased license retroactively ( we calculate the amount by the number of remaining days on your old yearly licence).

Hope this helps. 

If you need some further assistance, please don't hesitate to contact us.

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.