What you can try is to rename the configuration folder, but make sure you don't delete any of the other extensions from within extension manager. Only remove Menu Writer and re-install it. Then try running it in Dreamweaver. If this works, then you will have to re-install all the extensions (make sure you test them after installing each one). If the extension still isn't working, you can close dreamweaver and extension manager and then delete the current configuration folder and rename the old one back to configuration. This will restore the extensions you had installed previously. Let me know how that goes.