From your website
CF-XR10 (not for upgrade from stock firmware)
Upgrade: CF-XR10-v2.7.6.bin
CF-WR619AC (not for upgrade from stock firmware)
Upgrade: CF-WR619AC-v2.7.6.bin
if its not the stock hardware, what hardware is it?
Is there a Factory file that’s missing from the site?
(EG the Linksys Brands have a factory .img example)