sbackup crashed on startup

[Don Shane]

coercing to Unicode: need string or buffer, NoneType found

Traceback (most recent call last):
  File "/usr/share/sbackup/sbackup/ui/configgui.py", line 1103, in on_dest1_toggled
    self.on_dest_localpath_selection_changed()
  File "/usr/share/sbackup/sbackup/ui/configgui.py", line 1542, in on_dest_localpath_selection_changed
    if (os.path.isdir(_target) and os.access(_target, os.R_OK | os.W_OK | os.X_OK)):
  File "/usr/lib/python2.7/genericpath.py", line 41, in isdir
    st = os.stat(s)
TypeError: coercing to Unicode: need string or buffer, NoneType found

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Linux Mint 16, Mate

Simple Backup Suite 0.11.4

Installed from Mint repository