> You should also write a text file inside the program distribution
> package where you make these things clear, that it is freeware and that
> non-profit distribution is allowed, and that you own the copyright.
> Like this:
> "You may redistribute Dynamic Draw Professional as long
> as as it is not sold and remains freeware.
> The name of the program must remain the same and the
> copyright remains with the author, Masayuki Fukushiro.
> This notice may not be removed from the distribution package"
The text file can have the name license.txt and such a file tells
people what the author allows people to do with the program, and what
is not allowed.
It also explains who owns the copyright to the program, who has made
it.
Or you can add it to the readme file you already have in the program,
before or after the section "About End-User Software License Agreement"