AccuWeather Stratus 1.1 - weird display

PC is an HP desktop running Win7/x64.  I installed the latest version of Adobe Air, and after that installed AccuWeather Stratus 1.1.  However, the display on the app is strange.  It shows initially with no temperature info, and if I try to configure a city it gives me the list of cities, but will not remember it.  If I click the "5" button (to show the five-day forecast) I get two rows of undefinedundefinedundefinedundefinedundefined, with the words overlapping each other.

Looks like something went wrong, but what?  I uninstalled both Air and the app, deleted any remaining folders and rebooted the computer...but no joy.

Thanks in advance for any guidance.