USB4Car 1.4.2 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the software is USB4Car. We recommend checking the downloaded files with any free antivirus.
From the developer:
USB4Car is a Windows app that makes any USB stick play music in any car. Car radios are surprisingly picky: the wrong USB format, an unsupported file type, too many folders, or one odd file name and your music silently refuses to play - often with a cryptic error like "no compatible files found". USB4Car handles all of it with one button.