Preferences cannot be opened

[Thomas]

Hi Stani,
clicking on preferences the following failure appears in the Shell window

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Python 2.7.12 (default, Nov 19 2016, 06:48:10)
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
Traceback (most recent call last):
  File "/usr/share/spe/_spe/Menu.py", line 422, in menu_preferences
    self.parentPanel.preferences()
  File "/usr/share/spe/_spe/Parent.py", line 555, in preferences
    prefs=preferencesDialog.Create(self,-1,'')
  File "/usr/share/spe/_spe/dialogs/preferencesDialog.py", line 117, in __init__
    self.__do_layout()
  File "/usr/share/spe/_spe/dialogs/preferencesDialog.py", line 208, in __do_layout
    grid_sizer_4.Add(self.label_encoding, 0, wx.LEFT|wx.FIXED_MINSIZE, 4)
  File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/_core.py", line 14453, in Add
    return _core_.Sizer_Add(*args, **kwargs)
wx._core.PyAssertionError: C++ assertion "Assert failure" failed at ../src/common/sizer.cpp(1401) in DoInsert(): too many items (7 > 2*3) in grid sizer (maybe you should omit the number of either rows or columns?)

Version 0.8.4.h-3.2
wxPython 3.0.2.0.
Ubuntu 16.04LTE