I just saw that the executable (on Windows) is in the zip file within the source.

I think what I said still holds to a good degree. Most users expect (and need) the installation to proceed through "setup".

That's not to say it isn't a neat tool.

I think the title stresses the wrong thing. It's a neat tool that allows you to play with image processing operations. It has nothing to do with being "for everyone" and more to do with making experimentation with image processing techniques easy as drag-and-drop. That's the value proposition.

Probably nit-picking.