RET541 - How to Factory Reset

Hi,
I have written a change out doc for our RET541 Relays and tested it on our spare relay. I now need to factory reset the relay so it can go back in store.

How do you factory reset a RET541 relay?
I have CAP505 V2.5.0 Working and Terminal Emulator also working, can I use either of these to factory reset?

Regards

Casey