that applies to if its a USB data logger
and putting that into serial mode is actualy USB to serial emulation, with a com port number assigned to that driver
that will show up in device manager, ports
this usb to virual serial mode is on by default, but you do need to install weather link at least to get that driver installed
the problem with 3rd party software only results if USB mode is selected in weatherlink instead of serial mode (USB mode being actually USBExpress mode)