You are currently using FRITZ!OS version 06.06.
For information about the new features included in the new FRITZ!OS, go to:
new security page in the Diagnostics area
FRITZ!NAS now with HTML media player
VDSL Interop improvements
added temperature display and countdown for Smart Home
added support for Google 'all inclusive' music service
Have been running this since last night with no problems. Some nice new options within the interface.
Have a look at the link above for detailed information on changes, updates, additions.