To install and activate your product(s):
1. Please visit: https://primestudio.at/magento2/index.php/customer/account/login/
2. If you are new to Prime Studio create a new account at: https://primestudio.at/magento2/index.php/customer/account/create/
3. Click "Product Activation" https://primestudio.at/magento2/index.php/produktaktivierung/
4. Copy/Paste the serial number/activation key and click "Activate".
5. Follow these "How To" steps to install your products: https://primestudio.at/magento2/how-to