"How to install and run tidy"

Hi Dave,
A very basic question? I downloaded "tidy" by the way i think it is
wonderful that some one is doing this, Congratulations!
Any how i have tidy in it's own folder,called "tidy" my problem is i
don't know
how to open the program so that i can use it. I open the dos window
but cant get the program opened, can you help? Regards Jerry.