Sorry for the slow reply, I was getting married and am now on my honeymoon (just sneaking in some work while Monika is doing some exercise).
Yes, you can change the URL via the View menu in the top right of the interface. Go to the ‘Change preview site URL’ option. Then enter the full new URL (http://www.alleghefunivie.com/home) and the click the green GO button. That should work. You may have to refresh the page though.