Hi There haw do I reinstall the original walkera f

Hi there I the Deviation manual under New installations it says the the original walkere firmware and models is saved in the devo 10 so ti can be reinstated if required
I need to reinstall it as it has the model setup for my TAROT 650 and I need to get it back so I can fly my drone.
No-were in the Manuel does it explain haw to reinstall this fern-ware.
can sum one please help me
I have ben trying to sort this out for 12 weeks with no result
Regard John

1. Download Dfuse_Tools
walkera-fans.de/walkera-update-anleitung...date_mit_Dfuse_Tools
2. Download original firmware
walkera-fans.de/category/sender-modelleinstellungen/devo-10/