problem start Grub Customizer in LUBUNTU

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http://askubuntu.com – i am Vassilis from Greece and i just installed lubuntu in my desktop. i tried to install Grub Customizer but have problems i used succesfully the commands sudo add-apt-repository ppa:danielrichter2007/grub-customizer sudo apt-get update sudo apt-get install grub-customizer but i can not find the Applications > System Tools > Grub Customizer i also run in a terminal gksu grub-customizer but nothing happened what to do? Please help me (HowTos)