For ECAD we are currently using PCAD2006. You can download a viewer for this format here (it is on the bottum of the page)
To download this files go the the according git repository
For the future it would be great if we could move to another EDA Software - preferable KiCad or gEDA. If you can help us in translating the layout to one of this two Softwarepackages don't hesitate to contact us.