Diatoma Clarity

I bought this system back in 2015 and what was stated any and ALL UPDATES where free ...now since i've been gone and you changed the Terms of service ...i dont think its fair to those who purchase this back in 2015 based on a lie that all updates are FREE!! I would like a refund ..I dont want to pay more money for something i was promised would be freely updated....i think linden should really look into this!!!