Today I uninstalled Adobe Air and JuiceboxBuilder-Pro. I click on the application(s) in the Applications folder then select See Package Contents. Generally there will be one folder called contents. I delete that folder then delete the application. I did this for Adobe Air and JuiceboxBuilder-Pro. Note for Mac users: Go to Users folder and find yours. Inside there is a Documents folder. In there you will find a JuiceboxBuilder-Pro folder. Delete that folder as it remains after deleting Air and Builder-Pro.
Reinstalled Air 33.1.1.744 as specified. Installed Builder-Pro 1.5.1. Program now opens as it should. Opened a couple small existing galleries OK. However,, when I tried to open my largest gallery, I had the spinning circle that indicated the gallery was loading but then it quit as did the program...no more opening the galleries I had previously opened and could not create a new gallery.
Went through the uninstall - reinstall process again and all works as before but I will not try opening the gallery that crashed the program. Have no idea why program crashed; if there is a log I should be looking at or a .plist that may give a clue I would like to examine it. Gallery is large, nearly 70 images, but it had opened before after a fairly long delay. Other galleries that opened contained around 40 images.
I could be a unique problem as my Trashcan Mac 6,1 (late 2013) is running Mac OS 15.3.2 via OpenCore legacy patcher and I have run into memory allocation problems with other programs, notably the web browser Vivaldi which is based on Chrome. I do have an 8-core processor and 64gb of ram.
For now I will try to recreate my large gallery from scratch and see how many images I can load until the program crashes again. Should be interesting.
The config.xml files for all the galleries I tried opened fine in both Safari (18.3.1) and Dreamweaver 2021 (21.4) so I don't think file corruption is the problem. Likewise, the index.html files open fine in both programs.