Immediately after the payment you will get e-mail with your order details and Activation Key that you can immediately use to activate XS Material Presets.
At any time, you can sign-in to your account at Siger Studio and in the Customer Area > Orders you can find your Activation Key in the purchase order.
1. Run 3ds Max and launch XSMP plugin. A window prompting for activation will pop up.
To activate the license, internet connection is necessary.