Ok this now fixed and the download updated. Please grab a fresh copy and reinstall. It also now can work off city and state along with the Where On Earth Identifiers(WOEID) method, so you can choose whichever method you prefer.
There seems to be a problem displaying images.
Trying to pull image from http://www.shape5.com/demo/charlestown//modules/mod_s5_weather/s5_weather/.png
Its also stopping my tab show module working/sliding using Velocity template