Backups are not working.

[joximu]

no!

theese values are used to communicate with the gui:
if you load the formular (where you can change the backup-setting) then the "_"-values are used to fill the form.

After saving the new settings, the pure values (without _) are saved to the database:
$allowbackup = preg_replace("/\_/", "", $_POST['backup']);
here the _ are removed...

/J