crash on enabling hamster plugin

In the daily ppa, when I enable hamster plugin, the application crashes with following Traceback:
Traceback (most recent call last):
  File "/usr/share/gtg/GTG/gtk/plugins.py", line 259, in on_plugin_toggle
    self.pengine.activate_plugins([plugin])
  File "/usr/share/gtg/GTG/core/plugins/engine.py", line 214, in activate_plugins
    plugin.instance.activate(api)
  File "/usr/share/gtg/GTG/plugins/hamster/hamster.py", line 187, in activate
    self.preferences_load()
  File "/usr/share/gtg/GTG/plugins/hamster/hamster.py", line 311, in preferences_load
    self.PLUGIN_NAME, "preferences",
AttributeError: hamsterPlugin instance has no attribute 'PLUGIN_NAME'