Update 4.Firmware-Update.md

Author: meatpiHQ

docs/content/0.Config/4.Firmware-Update.md

@@ -26,4 +26,6 @@ For firmware version v1.00 method "USB flash" has to be used.
     - OBD ![image](/config/firmware/obd.png)
     - USB ![image](/config/firmware/usb.png)
 1. After you plug in the USB cable the Orange LED will light up. Now click `START` button on the flash tool.
+   
+**Note: If you're trying to recover the device, you must 'ERASE' before clicking 'START'. This will ensure that any bad configuration files are deleted.**