User profile widget
On your WP Dashboard, go to the Media >> Add New.
Click the Select Files button and upload your photo.
Once it has been uploaded, it will give you a link to edit, click the link.

A page with the image information will show up. It gives you the photo’s URL under the File URL field. Click the Copy URL to clipboard button.
Go to Appearance >> Widgets.
Under the SheShoppesCo >> User Profile widget, paste the URL into the URL to Photo field and save the widget.
