Requires a reboot. Changelog posted today 
http://forum.bitdefender.com/index.php?s=&...st&p=226181
For those who want to be notified by your Bitdefender of a reboot being required, can open the main BD UI /Personal settings icon at the top/General Settings/Update tab/Postpone reboot to off, and you'll receive a notification as shown below.

edit:sp