[Plugin: Ultimate TinyMCE] Visual Tab blank in Editor

After activating the v 1.7 plugin if you try to edit anything, the Visual tab in the editor is blank, but the HTML tab is populated. I thought it was a theme issue, but the author saw some 404 errors indicating editor_plugin.js was not found, and suggested manually installing the pluging. Did that, no change. I checked my webserver and the editor_plugin.js is definitely there. Even changed permissions on the the file to 755, no effect. Any ideas?

https://www.ads-software.com/extend/plugins/ultimate-tinymce/