Can't install CF Builder 2

I am trying to install the latest versin (CF Builder 2, update 2) on my iMac (2013 model, 8GB RAM, OS X 10.8)  The installer launches but the intial screen is blank with only the "next" button visible. It wil not progress from there. I've tried re-booting and re-installing with not luck.

Anyone seen this?  Given the lack of CF support in Dreamweaver CC, I am trying to install CFB as recommened. Needless to say, a bit frustrating!  I also do not see any logs generated for the install attempt, so there is little in the way of clues to help.

Thanks in advance for any suggestions.