ernienet Having tried replicating the same in local install, I can see specific mapping functionality working fine as per video tutorial
If still unable to get the specific plugin to configure and function right, Can you add your admin and ftp details in edit fields in in order for us to take closer look.
For reference, You can follow thread post (5 point) procedure.
The fact that it's displaying "DT_CLICK_TO_MAP_EVENTS" on the button in the plugin, and "DT_MAP" in the pop-up
You may change the text accordingly in specific file around line 57 and 90:
$value = JText::_("DT_CLICK_TO_MAP_EVENTS");
title: '<?php echo JText::_('DT_EVENTS_MAPPING')?>',