If you get crashes or visual bugs, only enable one new mod at a time to test for conflicts.
Go to the installation folder of Train Fever then open "res" folder and then "config" folder. This is typically located at "C:\Program Files (x86)\Steam\steamapps\common\Train Fever\res\config" for ...
Launch the game and press F1. You should see the Configuration Manager window open if everything is installed correctly. When installing mods for Hollow Knight: Silksong, each one may have slightly ...