Hello, Kristian!
Thank you for your purchase.
As you probably know by now, when you purchased the Agama-Pro theme, you got a completely new theme and your Agama theme remain untouched, so if you want, you can switch to it anytime.
The next step is to register your theme. http://docs.theme-vision.com/article/product-registration/
Also, there is a migration option, to help you to migrate all the settings from your Agama to Agama-Pro theme.
http://docs.theme-vision.com/article/migration-from-agama-free-to-agama-pro/
If you have any further questions, feel free to contact us again.
Best regards