I am trying to setup the FPD so that the popup window that appears when you click on the upload area, has a specific order of options.
It needs to have Choose from Designs first, then Add Image, then Add Text. Left to right. In the attached screenshot, it's showing what the current order of options is.
Is this possible, and if so then what do I need to do?
That's currently not possible, no sorry. You could make a feature request for this of course.