There is no need to do this if you use it with Log4OM and export from there.
Doing this will not intefere with Gridtracher.
In WSJT-x open the settings tab from the main File menu.
Now select the Reporting tab.
Tick the Enable logged contact UDP Broadcast
In server name or IP address 81.174.154.157
In server port number 23308
Now press OK at the bottom of the page and your done.
Now all the logging you do with the program will also be set to this server.