Download MIDI OX : http://www.midiox.com/
Open MIDI OX
Select Actions > Play MIDI...
A new MIDI player window will open
Select the folder icon
Select the firmware (.mid) file you've downloaded from the iConnectivity website for your interface.
https://www.iconnectivity.com/firmware
Now select the MIDI button
This should open a new window showing the MIDI ports connected to your computer.
Select the interface in bootloader mode.
Select OK
Click the Play button >
Once file is fully played power your interface off then back on by disconnecting and reconnecting the power OR pressing and holding the knob/button on your interface until the lights go out and then click again to turn it back on.