MX Simulator

Im building a track and its my first time doing it. I am about half way done and i was wonder if i need to do something with the terrain.png file since my terrain.png file is just black and i cant see the height differences and the track layout.

it would be nice if someone know whats wrong or know what to do and help me with this

The game saves in "%localappdata%\MX Simulator". You're probably looking in "C:\Program Files (x86)\MX Simulator" which the game reads from but doesn't have permission to write to on modern versions of Windows.