Yup , using upnp is easier and i think it is enabled by default during Morpheus installation.No need to use fixed port number or setup router forwarding.
But you have to check if the router supports upnp.
If it does , then you might need to enable/turn on in the router setup page.
Normally you can do this by going to http://192.168.0.1 or http://192.168.1.1 , some routers might use other addreses e.g 192.168.0.100
To check upnp is working correctly on your system, open Control Panel-Network Connections.
You should see Internet Connection or Gateway device listed in there.