Backup option missing


I have the most recent stable branch (downloaded yesterday from git) installed on my Jessie machine and I was looking under “Extra” as this page Import / Backup - Guide | OpenEnergyMonitor suggests that this is where I should look. Nothing there though. I thought this post Backup Export not working was a similar problem but this seems to be more around the paths on a Rpi. Is there something specific I should be doing to activate the backup module. I also trawled through the “settings.php” which does not give any hint on this.