DPR house builder v1_3_1 for blender not showing in addons

I loaded DPR house builder v1.3.1 through the extensions menu, and it appeared in the correct addon folder. However it doesn’t appear on the addon menu in Blender 2.78. I’m using a Mac OS 10.12.6. Anyone else have this problem, and if so, please share info.

With the debut of Blender 2.79 and Archipack add-on, I’ll easily get by.