I bought "#6510SER Davis WeatherLink Computer Interface" which contained data logger and Software CD-ROM.
Although I could select USB interface model, I selected serial interface model for highly interoperability with other devices.
Data logger was installed into the console. Then, it was connected with PC through USB-Serial Converter Buffalo BHC-US-1/GP (Prolific PL2303).
Figure of connection
Next, I installed the software called WeatherLink from CD-ROM into my PC.
Then, I executed this program.
Screen capture of WeatherLink
WeatherLink worked fine on Windows7(x64) in my PC.