Settings.ini
From XStoryPlayer Wiki
The 'settings.ini' file contains all the settings that are custom for your installed version.
Registry: The registry is not used for any settings, all the settings are in the settings.ini file.
Reset settings: If you have issues starting XStoryPlayer after changing settings: Simply removing the settings.ini and start XStoryPlayer. It will create a new settings.ini with default settings.
Settings menu: Most settings in the settings.ini can be changed using the settings menu in XStoryPlayer.
Special settings:
Here is an overview of special settings for more experienced modders/users.