@Windrunner21 Here is where all your currently downloaded maps should be located...
Directory.png
From there what you want to do is copy any of the maps you want to examine and paste them somewhere else on your computer. I personally just made a folder on my desktop called Triple A related.
Once you have all the maps in the new folder you should unzip them so that it is easier to access all the sub folders inside each one.
Once you have a map folder unzipped it will look like this...
Map folder2.png
The XML is inside the Games folder. (Note if the map has more than one game variants you will see mulptile XMLs inside).
As far as opening the XML you want to use Notepad or some other reader program.
I personally use Notepad++ that I downloaded free.