Download the compressed file(s) below appropriate for your computer's operating system. For linux download both files and cat them into tar to uncompress. Similarly for Windows download them both, right-click on the first one and choose 7z to uncompress. For MacOS simply double-click the .zip file to uncompress. Then, to launch SongExplorer, right-click on "OPEN-IN-TERMINAL.sh" or "RUN-WITH-POWERSHELL.bat" and choose from the pop-up menu. The GUI should shortly appear in your default browser.