Hi Steven,
Thank you, I managed to do it without any help thanks to all the recommendations in the forum posts.
Uninstalling Adobe Air returned error messages, which kept me from making any progress.
After that, I tracked down all the hidden Adobe Air files (they were well hidden in both the Windows 10 and Windows 11 sections of my PC). I also removed the old Juicebox builder program from my PC. Then I installed the correct version of Adobe Air using the link you gave me and then reinstalled Juicebox.
And the miracle happened ;-) I'm so happy because I'm so happy with Juicebox, as it defines the look of my entire website.
Thank you so much for all the support.
Have a nice day,
Ellen

Hi Steven,
Thank you for all the options!
When my computer support person has time to look into it, I'll let you know as soon as possible what happened.
Thanks again and have a nice day,
Ellen

Dear all,

After a computer crash that was rescued by someone who immediately upgraded to Windows 11, my Juicebox Builder Lite no longer works.
I do see the opening screen, but then it disappears.
Even after redownloading, there's no change.
What else can I try?

Kind regards,
Ellen