Docent, here is the thing:
I was really busy with something more important than TDU or any mod and i really wasn't going to put much effort in helping not only you but anyone who actually asks for it in here. But as a matter of fact, you were the only one actually asking for help. So yes, i was intentionally avoiding to help people because i had to focus my attention and effort into more important things. Is that a really poop move? Or is it a poop move only because it involves you?
Another thing, i really can't help much people who change a lot of things in their games and when something goes wrong, come ask me how to fix it. Modding TDU is not an exact thing that if something goes wrong, there is a recipe to fix. You must take a look, find where the issue is at and then find a way to fix it. So, as i said before, it's hard to tell what is exactly your problem, because i can't look what is going on.
But, if you say that it worked before, and now it doesn't, it can only be something you did. Either you got an old DB.bnk, or edited the bots.db, or replaced it wrong, or even the car class changes. I doubt, but it's possible.
Plus, another thing, i will start work again in TDU Platinum, which i believe will be the final version of this, as car dealers are really running low now, and i know for sure it will work and "fix" your problem. Thing is, it will be up to you to get it and certainly get your changes erased, or you remain with your changes and the issue with the races, because really, since you changed apparently a lot of stuff, i really don't know what is causing your problem.
And as i tell everyone who mods TDU as a tip, make backups. Yes, infinite backups.