Just an FYI. When 6.0.7 came out, I uninstalled 6.0.6, cleared out the bogus help menu items, and installed 6.0.7.
The accumulation of help menu items still continues.
In case it matters, here are other add-ins installed:
Chirpy, CodeSMART, Tabs Studio, DevEx suite (including CodeRush), XAML Power Toys, SQL Assistant, MS EF addins, InstallAware, PostSharp, PowerCommands, Productivity Power Tools, Snippet Designer, StickyNotes, XAML Intellisense Presenter