Hi Peter,
It is not possible to see two weeks on the dashboard, and it's not possible to set the starting day of the week, though this last one will be implemented as soon as we can.
The backup procedure is very problematic. First you have to set a MYSQLDUMP_COMMAND pointing to a program called "mysqldump". You can do this on file 'config/config.php'. Possible values are:
define('MYSQLDUMP_COMMAND', '/usr/bin/mysqldump'); // For Linux:
define('MYSQLDUMP_COMMAND', '"c:\Program Files\MySQL\MySQL Server 5.0\bin\mysqldump"'); // For Windows
Even when having this constant correctly defined, some people are still having problems with backup.