I just updated Vertex that is all. Does your site have some sort of server cache enabled? Perhaps this is why the front end loaded fine for me after the update.
Right now I swapped to the Beez3 template in the admin and still the front end doesn't show. So either its not template related or you have cache enabled. If you do have server cache enabled, please disable it so I can debug the issue.
i had to upload old files in order the site to be back online - this why i told you i cant update my site vertax version and joomla as well without damge the site - what can be done? its a real problem this vertax