How to stop Alacarte from crashing?

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http://askubuntu.com – Alacarte is crashing with this terminal output: Traceback (most recent call last): File "/usr/bin/alacarte", line 37, in <module> main() File "/usr/bin/alacarte", line 33, in main app = MainWindow(datadir, version) File "/usr/share/alacarte/Alacarte/MainWindow.py", line 43, in __init__ self.editor = MenuEditor() File "/usr/share/alacarte/Alacarte/MenuEditor.py", line 31, in __init__ self.load() File "/usr/share/alacarte/Alacarte/MenuEditor.py", line 45, in load raise ValueError("can not load menu tree %r" % (self.name,)) ValueError: can not load menu tree (HowTos)