No Manage extras after XBMC installed

Installed XBMC after second attempt but I cannot get into manage extras now any ideas other than reinstall?

I have the same problem, have you tried ssh'ing to the box and doing (I think, someone correct me if I am wrong) apt-get install --reinstall com.firecore.maintenance ?

Try doing command ‘killall -9 AppleTV’ when you have connected by ssh.