Problem Resolved
Erel:
My apologies. The problem mentioned was with my "OK" button on my overlaid configuration panel. In getting my project ready to export and upload to your site, I realized that my configuration panel "Cancel" button was working properly -- letting me get access to the Main Activity screen again, and when I checked what was different about the "Cancel" vs "OK" button code, I realized that I was removing panels for the configuration screen, but not the overall "background" panel that everything was loading into. So that panel was still present and intercepting clicks.
Problem solved. Thanks for responding.