For some reason when i start a race, i can't see any riders to select after i chose a team. I reinstalled the game, patched it, removed all files in documents folders, i even deleted the registry files, but each time i try to start a new race i cant see any riders. Anyone has had the same problem or knows a solution?

Are you sure you completely uninstalled the game? There's a lot of files, also hidden, which you need to remove manually.