I'm running 3.8.3 but I'll be darned if I can find Tidy and it doesn't show up in the MyEclipse preferences as shown in the features pages here. How do I get it?

Our integration of HTML Tidy was obsoleted when we upgraded all of source editors. Our new HTML editor in 3.8.X has its own formating and cleanup actions, so HTML tidy was unnecessary. I will put in a request to get those Feature pages updated to avoid confusion.

I hate to tell you this, Greg, but your "formating and cleanup actions" are absolutely pitiful compared to Tidy. You guys need to rethink that. In the mean time I'll reinstall the Tidy plugin.