Zim raises an error if Notebook folder has been deleted

When the default Notebook folder has been deleted, Zim raises an error and exit.
It's necessary to edit the config file notebooks.list to be able to launch zim again.

Shouldn't Zim display the popup by default if the default Notebook folder does not exists ?

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INFO: This is zim 0.65
DEBUG: Python version is sys.version_info(major=2, minor=7, micro=11, releaselevel='final', serial=0)
DEBUG: Platform is posix
DEBUG: Zim revision is:
  branch: zim-trunk
  revision: 805 <email address hidden>
  date: 2015-11-01 15:42:45 +0100
DEBUG: Not running from a source dir
DEBUG: Set XDG_DATA_HOME to /home/joack/.local/share
DEBUG: Set XDG_DATA_DIRS to [<Dir: /usr/share>, <Dir: /usr/local/share>]
DEBUG: Set XDG_CONFIG_HOME to /home/joack/.config
DEBUG: Set XDG_CONFIG_DIRS to [<Dir: /etc/xdg>]
DEBUG: Set XDG_CACHE_HOME to /home/joack/.cache
DEBUG: Loading config from: <zim.notebook.VirtualFile object at 0x7f123ed49290>