Butterfly Effect has a free, 7-day fully functional demo for you to try the plugin before you buy it, ensure you like it, and that it is compatible with your system. Nonetheless, if within 7 days after purchase you have not authorized your serial, you can contact the SoundBetter support team to request a refund. Once 7 days have passed from the purchase date, or if you authorized your serial to your iLok account, no refund will be issued.