I did a fresh install and a migration install of 6.3.5000. I noticed I was missing the design->responsive design menu option in the backend and checked the fresh/blank install and the menu item was there. i checked in config files and i noticed that i had some lines that were missing and a couple were disabled.
line 183 <config:link definitionName="RulesGroupBackend" path="responsiveDesignConfig/contentViewControls/RulesGroupBackend" module="ResponsiveDesign" />
line 21 <add version="6.3.5000.0" name="ResponsiveDesign" />
line 27 <add version="6.3.5000.0" name="MobileAppBuilder" />
--Files found. searched for 'responsive'
/website/sitefinity/services file exists
Any other ideas on how I can readd the menu item? I can create the page group and the page, but not sure how to add the widget for it (i notice i can define settings but still not able to add the blank widget and then define to it?)