While many modern Skylum purchases are activated simply by signing into your account, specific bundles (like those from B&H Photo , Humble Bundle , or Fanatical ) still utilize manual activation codes.
For bundle or retail purchases, users often see a prompt during the first launch to "Use Activation Code" or "Enter license key manually". Entering the code here links the software to the user's Skylum account for future use. luminar neo activation code