Your manual ip address looks strange to me. I see 198.168.0.10
Normal ip should be 192.168.x.x (x depends on your router and of course number of devices on your network)
example: 192.168.1.10
mask 255.255.255.0
dns 192.168.1.1
turn off dhcp
I'll be honest I have never direct connect my ETD with any of my computers. I just connect the ETD to a my router or switch.
In xLights why is your show directory on of the song folder? Its not going to stop anything just seems wrong.
As far as the Local area connection status: Yes normal ping would be around 30 packets since its trying to connect to a network (note: If you are only connecting to the ETD and not a router, it will never find a network. The ETD will not reply back to your computer, its a receiver only and not send or talk back.) btw: Windows Network map will never show a active network when directly connected to the ETD and is useless.
When you say erase ETD programing what exactly are you doing??
One more thing: Is the green led on inside the working ETD?
hope that helps some and is not clear as mud

Rick R.