Exception message: path is on drive D:, start on drive C:

Traceback:
  File "C:\Users\Admin\Devel\CEGUI\CEED\mainwindow.py", line 531, in slot_openFile

  File "C:\Users\Admin\Devel\CEGUI\CEED\mainwindow.py", line 387, in openEditorTab

  File "C:\Users\Admin\Devel\CEGUI\CEED\mainwindow.py", line 299, in createEditorForFile

  File "C:\Python27\lib\ntpath.py", line 512, in relpath
    % (path_prefix, start_prefix))