You can set most things back to default by deleting the cfg.txt file (when LFS is not running). Or more safely - rename it to something else, so you can get it back if you need to. LFS will write a default cfg.txt file when you next run it.
But you will lose nearly ALL settings that way, including your controls.
If you meant the custom car views, there are some car-specific .cvw files in the misc folder that can be deleted.
I'll move the thread to technical assistance forum.