Get source code from standalone application

I compiled an m-file into a standalone exe Windows file using deploytool and sent it to a customer. After the customer launched the exe file, it created some temporal local files in a hidden (but can be easily revealed in Windows) appdata user folder with some files in it. Amongst these files was an m-file with the same name as my source code. How it is possible? I thought making a standalone application prevents customers to reveal the source code.

Answer 1

[Walter Roberson]

My understanding is that the .m files will have the help information (leading comments). I could certainly be wrong on this point.