App with just Black Screen

I am trying to run this application on my Mac:  http://www.control4.com/software/control4-app-pcmac/latest

It tries to launch but just hangs with a black screen.  Previous versions ran fine...but then something happened.  After a version upgrade it at first would continually prompt me to "Allow keychain access for passwords" or something...in trying to follow their instruction about deleting some portion of my keychain related to Adobe.APS...I messed up and deleted my entire keychain.  So all passwords gone and a bunch of other headaches!!  Ugh.  But anyway, now the errors have gone away but the app doesn't run at all...just goes to a Control4 for PC-Mac window with nothing but black.

Have tried uninstalling Adobe Air, Adobe Flash and reinstalling.  Uninstalling and reinstalling MyHome PC.  No luck!

The developer tells me to delete the folder found here:

Library/ Application Support/Adobe/Air/ELS/MyHome PC

but I do not have that directory. When I go to Library/Application Support/Adobe/AIR

the only sub-directory I have is Updater.  There is no ELS

These are my versions:

Adobe Air Version:  21.0.0.176

Adobe Flash Version:  21.0.0.197

Control4 for PC-Mac V. 2.8.1.514313-res

Mac OS X Yosemite 10.10.5

Anyone willing to give this a go and see if they can figure out something / anything that might work for me??  Totally stumped and none too happy!

Thank you very much.

Tim