Hello @hsnww,
As you know all of our premium themes come with the initial 1 year of Subscription i.e. you can download the updates till 1 year of purchase date. But after one year, you will need to renew your subscription in order to continue downloading updates.
For the renewing process, you have to simply buy the new product(theme) and use the license that you get from the new purchase.
Hope this clears the confusion.
Thank you.
Best Regards!!