I've also tried this method as well, it's still there for some unknown reason. i didnt know defrag wanst good for flash drives.
ok , run
"rm -rf /usr/share/applications/hildon/bomberman.inactive /usr/share/applications/hildon/bomberman.desktop" as root.
it will solve your problem.
"rm -rf /usr/share/applications/hildon/bomberman.inactive /usr/share/applications/hildon/bomberman.desktop"
as root.
it will solve your problem.