Is it also possible to change how it is listed. I like how the tree view works but would like it to be able to maybe view it in a list or grid view using the same functionality as the tree view.
There is a couple of plugins that do that but they don't quite have the same either backend like yours or they can't do the zip download of the category like yours is able to.
I like the way that you set-up the back-end making it simple to understand and the way that the filing system works is absolutely the proper way to execute how it should be done.
I guess it is more of a feature request than a question or support so I will mark your answer as resolved.