Hiya,
Easiest way it to talk nicely to your distributor or FAE and ask if they can re-flash it for you.
Otherwise, you should be able to get things back together using the DWLWin program (available from the Developer Zone) and a WPK file (which you’ll have to get from your Distributor). Note that you’ll have to read ALL the doco that you can find so that you can make yourself a programming adapter (you need to manipulate the BOOT pin on the DB15 to get the device into BOOT mode).
Have a look at [forum.sierrawireless.com/t/fastrak-supreme-10-upgrade-firmware-to-r7-43/5426/4]for some notes about restoring a Fastrack Supreme (similar to a FXT-009) - but check your doco first to make sure you get the BOOT pin polarity correct.
ciao, Dave