I edited my main menu settings (unchecked items inside a sub menu) when it happened that the window freezed and all entries on the left side disappeared (Office, System, Settings, Games, ...). I didn't think much about it, but when I restarted my computer all application entries in my menu and my favorites (quickstart bar on the left side) where gone. When I go to activities -> applications I just see the "All" entry without any items to click on.

~/.config/menu/gnome-applications.menu

is an empty file and

~/.config/menu/gnome-settings.menu

has the folowing content:

<!DOCTYPE Menu
  PUBLIC '-//freedesktop//DTD Menu 1.0//EN'
  'http://standards.freedesktop.org/menu-spec/menu-1.0.dtd'>
<Menu>
    <Name>Desktop</Name>
    <MergeFile type="parent">/etc/xdg/menus/gnome-settings.menu</MergeFile>
</Menu>

I also looked into the files under /etc/xdg/menus. They look like template files without any reference to actual installed programs. I assume that due to a bug it deleted all my menu settings. Is there any way to restore at least the default menu? Or are there any other places to look for my old configuration?