First of all, this thread is for the no PWS required version of the driver. It does not require Weather-Display and does not ask for the Station Data File Location. I am guessing you loaded the wrong driver version that requires a PWS and Weather-Display software.
The 'Station Data File Location' needs to the location of the 'clientraw.txt' data file that Weather-Display creates. It should be a URL like 'http://your_weather_website/' where the 'clientraw.txt file resides.
That driver requires the Weather-Display data files as its primary source, It can pull in from OpenWeatherMap forecast data to supplement that, but it will not work without access to the Weather-Display data files.
Read this post on how to expose the Weather-Display data files in JSON format... Weather-Display Driver