You should access your registrations and download links by logging in with your Stardock account at https://store.stardock.com/myaccount/products or installing through Stardock Central (currently in beta but available at https://www.stardock.com/products/stardockcentral/ ).
Keep in mind that trial versions of our software are not upgradable to the full versions by entering a product key, and they must be uninstalled and the PC rebooted before installing the full version of any app.