This is a software update, with Pathology Module 4 to add to your HeartWorks Simulator HW0104 & HW0206. This was for the Gateway subscription purchased on these 2 systems, so this has all be paid for.
HW0104 GateWay – Subscription runs from 25 October 2013 to 24 October 2014 and includes any software updates and new pathologies that are released during this time period
HW0206 GateWay – Subscription runs from 18 March 2014 to 17 March 2015 and includes any software updates and new pathologies that are released during this time period
If you need any other explanations, then I am sure Craig will update you.
Let us know how the software updates go.