[Plugin: WP Customer Reviews] Logged in Users Only

you could do a conditional logic on this in your functions file

<?php
if ( is_user_logged_in()  ) {
   echo ' <style>

	</style>';
} else {

	echo ' <style>
	#whatever-the-plugin-id{
			display:none;

	}

	</style>' ;
}
?>

I know this is not the cool way and there could be other options as well, but its a quick solution

Thanks Robin but I need something that allows the user to be able to upload their image/avitar and my developer says we can’t do it with the plugin.

you can use advance custom fields (ACF)