This is my absolute favorite in Tower3D without the name change. (McCarren) I have some custom real life schedules, can those still be created in this new game. 80/hr. I never make it, I go over the hour but I try.
You have to delete the Nyerges Design files, and re-download them from the original link you'd have been emailed on initial purchase. This will re-install Nyerges Design's World Color and World Traffic into whichever airports you have.
Just pop the folder where all the other airports are my friend - "Tower Simulator 3 > Airports" That Folder should be filled with folders called KLAX, TIST, KLGA etc so past or Extract KLAS into there ✌🏼