If you cannot reinstall AIR, it sounds like there may still be a remnant of an old installation lingering around somewhere.
It sounds like you may have already done this but try this for starters:
(1) Uninstall AIR (if you can) via the Control Panel -> Programs -> Uninstall a program
(2) Afterwards, manually delete the following folders (if they exist):
C:\Program Files (x86)\Common Files\Adobe AIR
C:\Users\Notebook\AppData\Local\Adobe\AIR
C:\Users\Notebook\AppData\Roaming\Adobe\AIR
I'm really not sure if it will make a difference but perhaps if I saw a screenshot of the problem, it might trigger a memory of something that might help. (You can post a screenshot here in the forum or upload one elsewhere and post a link.)
As the problem seems to be directly related to AIR (rather than JuiceboxBuilder itself), you could maybe post a new topic in the AIR discussions over on Harman's GitHub page. Maybe someone from the AIR support team can help further: https://github.com/airsdk/Adobe-Runtime … iscussions
Incidentally, please make sure that you are trying to install AIR v33.1.1.744 rather than the very latest version of AIR (v51.2.2.6). Please see here for details.
Please let me know how you get on. Thanks.