I am a Zen newbie and have installed the latest zen version. I also installed XAMPP so I could test the site locally. All was fine. I started to make template customisations, add pages, overides and suddenly all my pages are invisible. If i click on the home button I get a white screen and http://localhost/store/index.php?main_page=
Is there a master file that i have messed with by mistake?
Is there a test I can do to at least point me in the right direction.