Navigate to the extension on the Magento Marketplace
Select your Magento version on the right-hand side and add the extension to your cart.
Checkout with your cart (our extension is free)
Click 'Install' and use the given Magento key to install the extension into your shop through the Magento Connect Manager
Navigate to Configuration -> AristanderAI (ensure that Price Import and Event Tracking are enabled): enter the API key you should have received during account registration