JoomlaExplorer shows web server root

find siteroot/administrator/components/com_joomlaxplorer/.config/conf.php

edit it, I commented out the code that figures out what the document root is to be and manually inserted my own.  Tacky 
and not as elegant as the author, but I'm a noobie to PHP.

here is a sample..

//   !Note! This has been changed since joomlaXplorer 1.3.0
//   and now grants access to all directories for one level ABOVE this Site
//      $dir_above = substr( $mosConfig_absolute_path, 0, strrpos( $mosConfig_absolute_path, $GLOBALS["separator"] ));
//      if( !@is_readable($dir_above)) {
//              $GLOBALS["home_dir"] = $mosConfig_absolute_path;
//   the url corresponding with the home directory: (no trailing '/')
//              $GLOBALS["home_url"] = $mosConfig_live_site;
//      }
//      else {
//              $GLOBALS["home_dir"] = $dir_above;
//   the url corresponding with the home directory: (no trailing '/')
//              $GLOBALS["home_url"] = substr( $mosConfig_live_site, 0, strrpos($mosConfig_live_site, '/'));
//      }
$GLOBALS["home_dir"] = "/var/www/yoursite/";
$GLOBALS["home_url"] = "http://www.yoursite.com/";