On the 'Images' tab of JuiceboxBuilder-Pro, you can drag and drop thumbnails into a new order.
You can also use Ctrl+Click to highlight a selection of images or Shift+Click to highlight a block of images and then drag and drop the highlighted images into a new order.
You can also sort the images using the 'Images -> Sort' option from the drop-down menu at the top.
Possible values to choose from are 'By File Name', 'By File Date' and 'Reverse'.
can one solve self a discussion ?
Yes. Just edit the first post in the thread and type "[SOLVED]" at the end of the 'Topic subject'.