How to configure Delivery center - changing output from BSV to PDF in Officemail

Based on the config file at the Delivery center:
PIOfficeMailDeliveryCenterService.exe.config 

there is an option named: 
BundleType="Bundled"
It can be set to Bundled or Simple.
When you change this setting to Simple, BSV file will not be created and PDF file will be created instead.
Please remember to restart Delivery center service after configuration change to take effect.