I'm sorry to hear that you're still unable to use JuiceboxBuilder-Pro.
Thank you for trying the beta and older versions of Adobe AIR.
Clearing the ELS folder has been known to fix the problem of non-responsive buttons on the 'Start' tab but it looks like this does not work in your case.
Please take a look at this forum thread.
It contains a fairly comprehensive list of things to check and try for users who are experiencing difficulties installing JuiceboxBuilder-Pro. I realise that this is not the same problem that you are facing but perhaps one of the suggestions will help.
However, I'm glad that you have found an alternative way to create your Juicebox-Pro galleries.