Small update. Some settings now persist between games played.
music, UI and VFX audio volume is now saved.
Player movement preference is now saved.
Performance settings are now saved.
To allow low powered PCs to start the game with best performance. There is an added launch option "-lowspecstart" which will start the game with MSAA, post processing and shadows disabled. All settings can be re-enabled while in the game. Once you are happy with your settings, and they are saved to file, you can launch the game with one of the other launch options.