Check if it is expired

Since the default handler is passed by, you should check if it is expired by yourself. In frame 1 of the main movie add a FSCommand.

FSCommand("FFish_Run", "CheckExpiry");

Insert the "CheckExpiry" script in SWFKit, and insert the following code into it

if (Application.isExpired && !isRegistered())
{
    // the application is expired
    FlashPlayer.targetGotoLabel("_root", "Expired");
}