2.2

• Changed how the initial output directory in the GUI is determined. It is now
  remembered separately for each image currently opened in GIMP.

• Added support for plug-in internationalization and localization. It is now
  possible to create translations of the plug-in (see the
  "Readme for Translators.txt" file in the package).

• Allowed again the following special characters in filenames:

  ~!@`#$%&=+{}[]
  

  They can appear even on Windows (which seems to be the most restrictive
  of the popular OSs as far as invalid characters go). The exceptions are '[' at
  the beginning and ']' at the end of the layer names, which are still removed,
  since they have a special meaning in the plug-in.

• When "No special handling" is selected, file extension strip mode will no
  longer default to "Strip identical file extension" (because the setting was
  always overwritten by its default value and thus did not remember the last
  used value).

• Misc. code refactoring and cleanup.