Search the exact file name in quotes on Reddit: "PS4 Tool Downgrade V1.00 Exe". You will find dozens of warnings.
To understand why a simple "PS4 Tool Downgrade V1.00 EXE" is unlikely, you must understand Sony’s defense-in-depth strategy. Ps4 Tool Downgrade V1.00 Exe
Some variants are not entirely malicious but are simply renamed versions of AutoMod or HEN (Homebrew Enabler). They will load a jailbreak for firmware 5.05 or 6.72, then display a fake message: "Downgrade successful to 1.00"—when in reality, the console remains on its original firmware. Search the exact file name in quotes on