Hi,
I presume you are referring that WeatherlinkPC software v6.0.2 does not work.
Since you are also using Cumulus (I presume Cumulus 1) does that still work, and download historical data at restart?
If Cumulus does not work as part of your Virtual VP setup can you run it by itself as a direct serial or virtual serial connection to the console/logger?
If Cumulus runs direct from logger, can you run WeatherlinkPC direct?
Some suggestions:
Reboot your logger
Upgrade WeatherlinkPC to current v6.0.5
Contact Davis Support.
Enjoy,
Paul