the Community Toolbar is a rather vague, it can come from a number of places, like face book, or an other application. See the following thread for some details on posible things to look into to remove the comunity toolbar:
another option is to disable preview.
Go to Edit -> WebAssist Preferences, and check the disable preview option in the preview section.
To edit a menu, you will need to modify the Dreamweaver settings.
Go to edit Preferences. In the Invisible Elements section, make sure the scripts is checked.