I'm not sure I understand the error at startup.
If you're not running VirtualVP, then WeatherLink shouldn't be running on its own when VPLive starts. In the VPLive configuration, you tell it where the wlk files are, and where the WeatherLink exe is, and you select the option in VPLive to run WeatherLink when VPLive starts. Then, when VPLive starts, it will run WeatherLink in such a way that WeatherLink opens, downloads the archive data and then closes. After it closes, VPLive will connect to the console and begin displaying live data. If everything is configured correctly, you should not get an error message saying it can't access the archive file.
Steve