The upgrade patches available from these directories and are designed to Upgrade from a lower version of firmware only. DO NOT attempt to "downgrade" to an earlier version using these upgrade patches. Doing so will cause the SLC to become non-functional. If you are having problems in a new version of firmware that did not occur in a previous version please contact Lantronix Technical Support by calling 800-422-7044, or submit a technical support request at http://ltxfaq.custhelp.com/cgi-bin/ltxfaq.cfg/php/enduser/ask.php