The script is available for download from http://gallery.technet.microsoft.com/How-to-change-upload-file-553aec27. You can also use Microsoft Script Browser for Windows PowerShell ISE to download the sample with one button click from within your scripting environment.
This script could be used to change upload file limit in specified Webapllication in SharePoint.
Changing the upload file limits need several steps by using GUI. So a script will be better instead.
You can find more All-In-One Script Framework script samples at https://aka.ms/onescriptingallery