This modification IS intentional (due to a poll taken in United Federal Nation (UFN), so it's not an error. The common filenames for the programs installer are rorconfig.exe, updater.exe or RoR.exe etc.
I added the 2021 buses into the pack, ReesesHeadYT did. You can install Rigs of Rods on Windows 2000/XP/XP Professional/Vista/7/8/10/11 32 and 64-bit.
The software lies within Games, more precisely Simulation.