Is the Emon software free to download or do I have to pay for it?
It's impossible to say what is the licence type of EditScript but based on the available information from 3rd party websites, it appears that the software is targeted to customers of Nuance. There is no info on the price, and the official website doesn't provide anything about this. It's just a login form for customers.
Since it's developed by Nuance, I recommend getting in touch with them to ask about the licence and price: http://www.nuance.com/company/company-overview/contact-us/index.htm?ref=footer