Thanks for getting back to me. I followed the steps in Grisha's blog post and was able to get everything to work, here are my steps:
Under Adiminstration --> Advanced --> Appearance in the StandardEditorConfiguration box I have my config file: ~/App_Data/Sitefinity/WebsiteTemplates/MyTemplate/App_Themes/Default/config/StandardToolsFile.xml
I know that the editor is picking it up, as I can comment out the Bold tool element and see that option be removed from the editor.
I added the
to my StandardToolsFile.xml and I can see also see the "Apply CSS Class" Drop down show up in the editor.
I also added a
element after all the tools elements.