1. Please log into your HitFile account first: https://hitfile.net/login

(If you don't have a HitFile account, you just need to register free account)

2. You can activate Premium Access Code here: https://hitfile.net/#paypopup, then click to "Activation"

3. Paste your Access Code in "Enter code here", and click "Activate a premium code" to become Premium user.