Zorro was kind enough to give me the link to the latest version of the software. It is now working as expected. Also, instead of putting in the arrow characters, you need to put in /l/r/u/d in the Letters field, and the icons will appear in there.
This is the best OSK software I have come across for my setup. MWI with iGkeys gives me all the functionality I am looking for to control iGuidance. Next step is to upgrade to a Griffin Powermate, then I'll be set :-)