I gave it a try and it looks very good!
I would like to make a few suggestions/notes, none of which are a big deal.
It would be nice if the new Windows Explorer window opened in the same state as the original one.
In my case, I usually have the original window maximized because my vision isn't the greatest. The
newly created window opened in normal state rather than maximized. If it would be a hassle to copy
the state, it's not worth too much effort. If it was just as easy to open maximized instead of normal
sized, I would prefer that.
It would be nice if the original window was closed after the new subfolder was created. Currently it
left the original window open, so I manually close it. If you think some people would prefer the original
window stay open, maybe a checkbox could be added to the Create Subfolder dialog defaulting to
Close.
This is really nitpicking, but all my existing URL files are named Url.txt rather than URL.txt.
I can manually change the case, but if you could change it to Url.txt it would save me the extra step.
Thanks for the program,