When closing an unsaved document, MarkdownPad shows a prompt, "Would you like to save your changes?". Normally, this user interface in Windows is pretty standard, whereby the button to not save changes has the access/mnemonic key on the letter "n". Meaning you can close almost any windows application that has unsaved changes from the keyboard using alt-f, x, n (&File menu, E&xit, &Do&n't Save). Unfortunately, MarkdownPad currently has the access key on the letter "d" on this button. Please could you consider moving it to the "n" to make it consistent with all other Windows applications, to help us keyboard users out, @evanw ?