I personally don't recommend you to use this utility for tweaking your FPS. I recently came upon an post from github from some user. He did cracked this program and received It's source code and so you think, this utility contains malware. Why? The thing is, that according to some people, the code was plagiarized by another person from NexusMods. By the way, this tool written on C# but still everything is even worse. In this "optimizer" there is a corny little software that changes the settings of the game, but after launching the software, it creates a separate hidden method that is obfuscated and injects cryptographically encrypted malware into RAM. The malware itself (from the module) looks like an application resource (in fact, it is completely encrypted / packed and cannot be recognised to today's modern antiviruses) and weigths tiny 4 KB. Isn't this strange guys? As I previously said, this malware is encrypted and even VirusTotal recognized 2/71.