Hello @danny2904,
If your license has not expired then the updates will be available in your Admin Panel > Updates. So you can update the theme from there.
But in case your license is expired then you won’t get any updates of the theme. For this, you need to repurchase the theme and again use that licnse key to get the automatic updates.
PS: License gets expired within a year of purchase.
Hope this helps.
If you have any query further then please let us know.
Thank you.
Best Regards!!