Yes. The filename is case-insensitive on Windows, but the emulator expects steamapi.ini (lowercase) in most cases. Rename it if you see Steam_Api.ini .
Sometimes, a Windows update or an over-zealous antivirus scan can corrupt or delete configuration files. If the game executable looks for steamapi.ini and finds it missing, the game will crash instantly. steamapi ini download install
Before overwriting anything, rename the original files: steamapi ini download install
Open the .ini file with Notepad to adjust settings: Username: Change UserName=Player to your preferred name. steamapi ini download install