The new FRITZ!OS 06.80 is available for your FRITZ!Box 7490.
You are currently using FRITZ!OS version 06.52.
Information about the new features included in the new FRITZ!OS.
NEW - wifi Band Steering
Reserved Bandwidth for the home network
improved Smart-Home-functions und more MyFRITZ!
FRITZ!Fon: Neue start screens and nightmode
improved security and network features
Release notes can be found here: ftp://ftp.avm.de/fritz.box/fritzbox.7490/firmware/english/info.txt
Updated OK and seems to be working fine!