Would it be possible to modify it to display ANY XML file in that directory, not just the ones it "looks for"? I would love to be able to create a copy of my inventory file, or whatever, so that I can have a work in progress while still being able to play. Then when I am done with the temporary file I can just rename it to the official file name. It could also be used to have other people's mods up so you can compare.
It may already have this functionality, but a couple of the files I have in my folder were not available in the program.
Any chance of making this open source, or sending the source code out? I would not have any desire (or skill probably) to finish it and put it out over your head after you did all the work, but I would absolutely LOVE to be able to get a hold of the code to see how you managed to create such an application. I learn by example and this seems like it would be an awesome tutorial of sorts .. commented or not!
Good work