You've downloaded and replaced your XFG with an old-school VOB mod.
You need to download/find the original XF.vob file and replace it.
The file is located in LFS/data/veh folder.
You can install a fresh copy of LFS and replace the VEH file or folder.
This type of mods are based on default vehicles in LFS, I recommend using the new mod system which is available for S3 licensed drivers like you. This way you will download mods in-game and don't bother with suspicious stuff.