In my case, Ubuntu Studio categories (Audio Production, Graphic Design, and Video Production) and others disappeared after hiding Education category. It was the first thing I edited.
I'm attaching xcfe-applications.menu in the state it was left after failing to hide only Education category, and also a snapshot of the menu hiding by mistake the mentioned categories. ** Attachment added: "xfce-applications.menu" https://bugs.launchpad.net/menulibre/+bug/1430571/+attachment/4681770/+files/xfce-applications.menu -- You received this bug notification because you are a member of Ubuntu Studio Bugs, which is subscribed to The Ubuntu Studio Project. Matching subscriptions: UbuntuStudio Bugs https://bugs.launchpad.net/bugs/1430571 Title: ubuntu studio menu items disappear after adding new launcher Status in MenuLibre: Confirmed Status in Ubuntu Studio: Confirmed Bug description: In ubuntu studio 14.04.2, menulibre 2.0.4 installed with apt-get. After having added two new launchers in Audio Production menu every other ubuntu-studio specific menu item disappeared. What remained is the Audio Production category containing my new launchers. Other category-items like accesories, electronics, development etc look good. There is another person having the same problem here: http://askubuntu.com/questions/532277/categories-vanish-when-using-menulibre-in-ubuntu-studio . It's frustrating as I don't know an easy way to rebuild the menu as it was, given the fact that many applications were installed after default installation. To manage notifications about this bug go to: https://bugs.launchpad.net/menulibre/+bug/1430571/+subscriptions -- Mailing list: https://launchpad.net/~ubuntustudio-bugs Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntustudio-bugs More help : https://help.launchpad.net/ListHelp

