Hi,
I presume like David you want to upload to the Davis "cloud" Weatherlink.com, and not to run it with WeatherlinkPC program on PC?
If so then what David replied, and as per attached.
If you want to connect to a PC with WeatherlinkPC program i.e. Weatherlink 6.0.5, then in this Weatherlink program Setup > Communications Port > select and tick TCP/IP and follow the next prompts. You likely will need to enter the WiFiLogger's IP address.
Enjoy,
Paul