public ScreenshotFormatChange(string acRoot, string value) {
_cfgFile = Path.Combine(FileUtils.GetSystemCfgDirectory(acRoot), "assetto_corsa.ini");
var iniFile = new IniFile(_cfgFile);
_originalFormat = iniFile["SCREENSHOT"].GetPossiblyEmpty("FORMAT");
iniFile["SCREENSHOT"].Set("FORMAT", value);
iniFile.Save();
}