First I have attached a file for RJ's DMX Deck which is a very simple program to communicate with the Lynx Express. Unzip and install the MSI file as Administrator then with your dongle connected to your LE try using the deck and see if the LED's (or plug in some lights) respond to the Deck. If they do then close the deck, open the config utility and set your start channel and light curves then put your LE in program mode (PGM) and press select so the dot appears on the display THEN hit the program bar on the config utility. If you LE didn't respond with the DMX Deck you may need to reflash your LE.
From the wiki:
Programming the Express:
(At the Express...) Put your Express in program mode by pressing the "Mode" button until "PRG" appears on the LED display. Next, press the "Select" button -- a decimal point (dot) will appear on the right of the LED display to show "PRG." You are now in program mode.
(At the software configuration tool...) Select the "Program" button to send the channel configuration and light curve software to the Express. If you can observe the Express's LED display, you should note that the starting channel number now appears on the display. If it continues to show "PRG.", press the button again. It may take multiple attempts.
NOTE: you may choose to start the configuration tool first, and select the "Program" button within the tool -- then visit the Express within your yard to press the "Mode", then "Select" buttons. Either order will work.
(At the Express...) After the channel is assigned, reboot the Express by pressing the "Reset" button.
Debugging:
If the channel assignment is not taking...
verify that the USB DMX dongle is connected to the computer (the Green LED should be flashing while it sends configuration data)
verify that the Express is connected to the dongle (the Green "DATA LINK" LED should be flashing while the configuration tool sends data)