I have bought the Setsail theme for about 3 years ago. I have never updated it. I cannot find the correct account on Ervato or Themeforest to find the purchase. I do have the invoice and the licence with all the codes.
Where can I find my purchase?
How to update it to the most recent theme in Wordpress?
without finding your account you will not be able to find your purchased item(s).
after login with the purchaser account you will find all of your purchased items in your Download page and you can download the most latest version from there. You can check your email to find your account username or email used in the account.