The UNI project belong to Aloft Hobbies & the Mike Blandford
Mike (or should I say Sir Blandford ;) ) is the developer of this great piece of software, and we all thank him for the dedication.
firmwares files: https://github.com/offer-shmuely/frsky-accst-uni-rx-firmware
install steps: https://github.com/offer-shmuely/frsky-accst-uni-rx-scripts/wiki#uni-install-steps
original forum: https://alofthobbies.com/collections/frsky-accst-receivers/products/uni-rx-universal-accst-receiver-firmware