From the Read Me file:
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Price, payment options and instructions:
* a single licence costs $30
* a family licence costs $40
* a commercial licence costs $60
* Buy online: http://www.contenta-converter.com/buy.php?so=
* Get it for free with Trialpay: http://www.trialpay.com/productpage/?c=d917e26&tid=6rGiGio
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Trialpay requires you to take advantage of another offer from another company before you get the software.