Please download the purchased plug-in from https://acondigital.com/products/ if you haven't already done so (the demo and full version binaries are identical). A dialog box appears the first time you open the plug-in in your host application where you can choose to continue with the demo version or enter a license key.
Please enter you name, company name (if applicable) and the license key you received upon purchase. Click the Authorize button as soon as it gets activated (it will remain deactivated until the license key has been accepted). The demo dialog box will not appear again after having successfully authorized the plug-in.