bazaar explorer doesnt start

Under latest stable release of bzr the explorer (and also tortoise) don't appear to work. I did try uninstalling and reinstalling the product.

bzr --version
Bazaar (bzr) 2.5.1
  Python interpreter: C:\Program Files (x86)\Bazaar\python26.dll 2.6.6
  Python standard library: C:\Program Files (x86)\Bazaar\lib\library.zip
  Platform: Windows-7-6.1.7601-SP1
  bzrlib: C:\Program Files (x86)\Bazaar\lib\library.zip\bzrlib
  Bazaar configuration: C:/Users/101150.WIN/AppData/Roaming/bazaar/2.0
  Bazaar log file: C:\Users\101150.WIN\Documents\.bzr.log

Copyright 2005-2012 Canonical Ltd.
http://bazaar.canonical.com/

bzr comes with ABSOLUTELY NO WARRANTY. bzr is free software, and
you may use, modify and redistribute it under the terms of the GNU
General Public License version 2 or later.

Bazaar is part of the GNU Project to produce a free operating system.

bzr plugins -v
bzrtools 2.5.0
  Various useful commands for working with bzr.
   C:\Program Files (x86)\Bazaar\plugins\bzrtools

changelog_merge 2.5.1
  Merge hook for GNU-format ChangeLog files
   C:\Program Files (x86)\Bazaar\plugins\changelog_merge

colo 0.4.0
  Work with colocated branches using current technology.
   C:\Program Files (x86)\Bazaar\plugins\colo

explorer 1.2.2
  Version Control for Human Beings.
   C:\Program Files (x86)\Bazaar\plugins\explorer

fastimport 0.14.0dev
  FastImport Plugin
   C:\Program Files (x86)\Bazaar\plugins\fastimport

git 0.6.8
  A GIT branch and repository format implementation for bzr.
   C:\Program Files (x86)\Bazaar\plugins\git

launchpad 2.5.1
  Launchpad.net integration plugin for Bazaar.
   C:\Program Files (x86)\Bazaar\plugins\launchpad

loom 2.3.0dev
  (no description)
   C:\Program Files (x86)\Bazaar\plugins\loom

netrc_credential_store 2.5.1
  Use ~/.netrc as a credential store for authentication.conf.
   C:\Program Files (x86)\Bazaar\plugins\netrc_credential_store

news_merge 2.5.1
  Merge hook for bzr's NEWS file.
   C:\Program Files (x86)\Bazaar\plugins\news_merge

pipeline 1.4.0
  Manage a series of branches as a pipeline.
   C:\Program Files (x86)\Bazaar\plugins\pipeline

qbzr 0.22.3
  QBzr - Qt-based frontend for Bazaar
   C:\Program Files (x86)\Bazaar\plugins\qbzr

rewrite 0.6.4dev
  Rebase support.
   C:\Program Files (x86)\Bazaar\plugins\rewrite

svn 1.2.2
  Support for Subversion branches
   C:\Program Files (x86)\Bazaar\plugins\svn

upload 1.2.0dev
  Upload a working tree, incrementally.
   C:\Program Files (x86)\Bazaar\plugins\upload

xmloutput 0.8.8
  This plugin adds an option (--xml) to log and provides an xml version of some builtin commands.
   C:\Program Files (x86)\Bazaar\plugins\xmloutput

bzr explorer
bzr: ERROR: bzrlib.util.configobj.configobj.ParseError: Invalid line at line "1".

Traceback (most recent call last):
  File "bzrlib\commands.pyo", line 920, in exception_to_return_code
  File "bzrlib\commands.pyo", line 1131, in run_bzr
  File "bzrlib\commands.pyo", line 673, in run_argv_aliases
  File "bzrlib\commands.pyo", line 695, in run
  File "bzrlib\cleanup.pyo", line 136, in run_simple
  File "bzrlib\cleanup.pyo", line 166, in _do_with_cleanups
  File "C:/Program Files (x86)/Bazaar/plugins\explorer\lib\commands.py", line 162, in run
  File "C:/Program Files (x86)/Bazaar/plugins\explorer\lib\explorer.py", line 208, in __init__
  File "C:/Program Files (x86)/Bazaar/plugins\explorer\lib\wt_browser.py", line 49, in __init__
  File "C:/Program Files (x86)/Bazaar/plugins\explorer\lib\wt_browser.py", line 450, in __init__
  File "C:/Program Files (x86)/Bazaar/plugins\explorer\lib\wt_browser.py", line 685, in __init__
  File "C:/Program Files (x86)/Bazaar/plugins\explorer\lib\wt_browser.py", line 628, in __init__
  File "C:/Program Files (x86)/Bazaar/plugins\qbzr\lib\treewidget.py", line 1357, in __init__
  File "C:/Program Files (x86)/Bazaar/plugins\qbzr\lib\treewidget.py", line 1693, in create_context_menu
  File "bzrlib\lazy_import.pyo", line 116, in __call__
  File "bzrlib\lazy_import.pyo", line 85, in _resolve
  File "bzrlib\lazy_import.pyo", line 200, in _import
  File "C:/Program Files (x86)/Bazaar/plugins\qbzr\lib\diff.py", line 42, in <module>
  File "C:/Program Files (x86)/Bazaar/plugins\qbzr\lib\util.py", line 128, in get_option
  File "C:/Program Files (x86)/Bazaar/plugins\qbzr\lib\util.py", line 109, in _load
  File "bzrlib\util\configobj\configobj.pyo", line 1223, in __init__
  File "bzrlib\util\configobj\configobj.pyo", line 1306, in _load
ParseError: Invalid line at line "1".

bzr 2.5.1 on python 2.6.6 (Windows-7-6.1.7601-SP1)
arguments: ['bzr', 'explorer']
plugins: bzrtools[2.5.0], changelog_merge[2.5.1], colo[0.4.0],
    explorer[1.2.2], fastimport[0.14.0dev], git[0.6.8], launchpad[2.5.1],
    loom[2.3.0dev], netrc_credential_store[2.5.1], news_merge[2.5.1],
    pipeline[1.4.0], qbzr[0.22.3], rewrite[0.6.4dev], svn[1.2.2],
    upload[1.2.0dev], xmloutput[0.8.8]
encoding: 'cp1252', fsenc: 'mbcs', lang: None

*** Bazaar has encountered an internal error. This probably indicates a
    bug in Bazaar. You can help us fix it by filing a bug report at
        https://bugs.launchpad.net/bzr/+filebug
    including this traceback and a description of the problem.