Hi Jeff, and welcome to Trixology's WeatherCat forum!
As you may no, LWC has not been supported since last summer, although several users have helped us nebies get things up and running over on the MacWeather.net forum.
Now Stu has released the follow-on product to LWC here at Trixology called WeatherCat. WeatherCat is the only product being supported by the author. If you purchased a license for LWC, Stu said that there will be a discount when purchasing WeatherCat.
If you want the latest and greatest application, then you want to download the latest beta of WeatherCat here:
http://athena.trixology.com/index.php?topic=199.0 Even though it is still in beta, it is already much better than the last version of LWC. WeatherCat will import all of your historical LWC data without a hitch.
If you don't intend to purchase WeatherCat, then your best bet is to grab the last version of the LWC application (v 2.1,1 build 50) here:
http://macweather.net/viewtopic.php?f=18&t=28 and replace your current version of the LWC application (assuming you are not already using 2.1.1)
The iOS version is an application that you can load on your iPhone to view your WeatherCat data anywhere. It does not work with LWC.
Hope that helps clarify things for you,
Steve