1. Go to https://themeforest.net/item/avada-responsive-multipurpose-theme/2833226?ref=ThemeFusion
  2. Sign in (upper right-hand corner)
  3. Hover over your signin name and go to Downloads
  4. Download License certificate & purchase code (text)
  5. Hover over your signin name and go to Settings
  6. API keys (to the left)
  7. Create an API Key  (Any label will do)

You’ll want to enter your signin name, purchase code, and API in the Product Registration page which is under Avada at the top of the page.