Pro update file is the so-called cfw (self-made system) firmware, and quick recovery is a small tool specially designed for v3 motherboard to quickly recover cfw. It must be restored on the basis of installing the corresponding version of pro update once, because the machine of v3 motherboard has not been completely cracked (now 6.x can brush cipl curing patch) and the ofw is restored after power failure, so it is born for convenience. Let's get this straight.

Homemade firmware takes advantage of loopholes in official firmware in order to run programs without digital signatures.