On February 7, 2012 we put out another minor release of the Managed Switch Port Mapping Tool. This release changes the way the Last Change Time column information is presented. It now shows the elapsed time since the port changed from 'up' to 'down' or vice versa.
It's easier to show this in a video, so here it is on youtube:
Version 2 is well under way. Please visit us at http://www.SwitchPortMapper.com/