How to restore built-in functions in toolbox to the original version

I'm doing some tests so I edit some codes in the built-in functions of phased array toolbox. Not sure if I changed anything by mistake, so I want to restore it to what it looked like at the beggining. Is there some way to do it?

Answer 1

[John D'Errico]

NEVER EDIT MATHWORKS SUPPLIED FUNCTIONS.

A rule I use for my own code is, if you change it, you own it. Any future problems are yours.

Ok but now you want to restore it. If you have a backup of your drives, then just use the backup. No backup? WHY NOT?????? ALWAYS backup your files. All files.

I'd probably just be lazy and download the newest release of MATLAB, because I tend to be slow and always be a release behind anyway. But I think you can re-download just a specific toolbox in your license. Easier just to do the whole thing, as the download is fast. And that insures EVERYTHING will be properly recovered.

https://www.mathworks.com/downloads/web_downloads/

But just make backups from now on.