Here are the new variable names:

the style arrays are now dictionaries:

DrFrame.prefs.PythonStyleArray is now DrFrame.prefs.PythonStyleDictionary

DrFrame.homedirectory is now
DrFrame.userpreferencesdirectory

I added DrFrame.GetPreferencesDirectory()

DrFrame.GetPluginDirectory()
is now DrFrame.GetPluginsDirectory()

I added DrFrame.GetActiveSTC()
(now only returns either the current Document or Prompt, depending on which has the focus).