1. Login with your Positive Grid account on the page here
2. Enter the SN# and click Submit, you will get an activation code via email.
You can find the SN# near the USB port on the back of your Spark amp.
3. Use your email to register/login on the page below
Once you login, go to "Register a product " on your Presonus account page to enter your activation code obtained from the step 2, then the download link will appear on your Presonus account page.