Update USB40F 

The Linux dfu-util tool can be used to backup or update the application image.

Use the following command to backup the SLOT-0 image:
dfu-util --alt 0 --upload slot0_backup.bint

Use the following command to update the application:

dfu-util --alt 1 --download USB40F_DFU2app_update.bin

It will take about 30 seconds copy the slot 1 to slot 0 and reboot.

The BLE advertising name change from "DFU 1" to "DFU 2"