Traffic.DLL

I have had some unexplained CTDs. I think I might have a bad Traffic.DLL . I have updated to 9.1 and the tag on the Traffic.DLL in the Modules folder says 9.1. If I get the Traffic.DLL from the disc and replace it would the tag say 9.0 ? Does anyone know if the 9.1 update, updated those .DLLs too?AND what disc would have that DLL ?Thanks