Go to Sumi > Theme Options > General > Widget Settings > Multi Widget to add your widget for your site.
Step 01. Enter the Title of your widget to “Name Widget” box.
Step 02. Click on “Add Widget” to add new widget.
Step 03. If you don’t want to use the widget which you have created before, click “Remove” to delete it.
Step 04. Click on “Save” to save all your settings.