I was using the Epic Systems driver but since the Amazon firmware update there does not seem to be much information regarding any progress on a fix to the Epic Systems driver.
Fortunately I received an email from Prakash Rola from DTI Automation.
They have developed a driver which looks and acts very similar to the original Epic Systems driver and it works with the new Amazon firmware on version 3 of Control4.
They are an Indian company and very friendly - if you need this type of driver it is worth looking them up and dropping them an email.