Super Sessions for Trainz Railroad Simulator
Another reason is that route authors tend to place the odd camera here and there without considering that someone else might build a session for their route. Although you can change other people's routes, the vendor does not allow you to then distribute the result. Thus, the only way to mute cameras that are built into a route is to either place another camera closer to the train, or place a trigger to switch to cabine view. (Our advice to route authors is to simply place any cameras in a dedicated layer, which avoids such unnecessary problems.)
If history is anything to go by, which it is, there's every reason to expect something like this to happen again in the future. Therefore, assuming you want to be able to enjoy tomorrow what you enjoy today, we advice you always keep back-ups of your old Trainz executables. (We currently have 6 different versions of Trainz installed. Takes up hardly any disk space at all. All it takes is to ensure they are all named differently, and do not share data folders.)