There's the round RH04 logo as part of the background screens in the mod, but the "real" season indicator icon should still say NAR2005. I left the rh logo because if I had removed it, it would have been like "stealing" their backgrounds, which would not be "right" given their effort.
If you haven't installed RH04, that's why you don't have the rh04 "main screen", along with the other RH04 GUI changes (including pit options). That's totally independent of the NAR mod, and the choice is left to the individual racers to install it or not because opinions about it vary widely. It's not required for NAR racing but you can use it if you want and it should not interfere.