Can you tell me the simplest program for replacing characters in CSV - FOR WINDOWS and a novice user?

Question

Programming

There is a file, you need a program that can convert the file in 1 click (maximum 2).
For example, at the input we have CSV at the output, but in the next folder.
the program should replace "," with "."
All variants with notepads, etc. I know, but it is the simplest program that interests the user - so that the user needs to run and press one button.

Answer 1

MS Excel, Find and Replace.

Answer 2

Notepad++
Visual Studio Code
Ctrl+F replace "," with "."
File - Save As...