While a project named ESX once claimed to exist, it is widely considered a hoax or fake by the emulation community, with many phishing sites using the name [2].
There is no evidence that this file enables PlayStation 3 emulation. Safe Alternatives: esx ps3 emu 097r5567 upd
The "upd" in the version string improved the bootstrapping loader. It can bypass certain encryption handshakes that later emulators enforce strictly. This is particularly useful for users with homebrewed PS3 backups (in folder format) that have been stripped of their digital signatures. While a project named ESX once claimed to