On the target computer...
Right click the network connection notification icon in the bottom right hand corner of your screen.
Left click "Open Network Connections"
Right click the connection that you are using to connect to the home network and select properties.
Configure the properties of the service that is called Internet Protocol (IP) or IPv4.
Assign an IP address that is on the same subset of numbers that your host computer is on. For example, if your host pc has an IP of 192.168.1.x, you need to have the first 7 numbers as 192.168.1.etc.
Try connecting directly to that IP now with whatever program you are using.