The search term "steamrldini" almost always refers to the configuration file . It is not a game title. The file is a critical component of game cracks (sometimes called "cracked" or "No-CD" patches) produced by the "RELOADED" (RLD) cracking group. The suffix ".ini" stands for "initialization," meaning it's a settings file that tells the game how to behave.
Understanding Steamrld.ini: A Guide to the RLD Steam Emulator Configuration File steamrldini
Look inside C:\ProgramData\Steam\ or your local AppData folder for files named after the old username and rename the folder to match your new profile name. The search term "steamrldini" almost always refers to