You can use the 'hack' below to hide the advisory dialog banner. Note that this will remove the banner for ALL advisory messages, including impending license expiration — so use at your own risk.
Open the following file in your favorite text editor:
C:\Program Files\Electric Cloud\ElectricCommander\apache\htdocs\commander\lib\StdFrame.php
Locate the line that reads:
echo "\n ";
Modify it to read:
You might have to restart Apache for this change to take affect.