If your server has a file size limit (often 2MB or 8MB) and the upload fails, you can use FTP: the js-composer.7.9.zip file on your computer. Connect to your site via FTP (using a tool like FileZilla).
js-composer.7.9.zip is a powerful tool for building custom layouts without touching code. However, treat this file like a car key: only use it if you own the car. js-composer.7.9.zip