It was made with Delphi 2005, ImageEn [1] (a Delphi component for loading & saving image file formats) and the Centaurix Delphi Photoshop component. Sadly Centaurix went out of business. Their SDK was designed for writing Photoshop plugins, but it also had some functions for loading & testing Photoshop plugins, and I used those. There were a lot of bugs that I had to patch to get it working.
I made it because my products are Photoshop plug-ins [2], but a lot of people were downloading them without having Photoshop. People would complain after installing that there wasn't a program to run. I thought including a bare-bones standalone graphics editor (no layers, no selections) with the Photoshop plugin download would solve that problem.
Actually, it didn't move the needle at all. Seems the people most likely to buy already had Photoshop / PaintShop Pro etc anyway. But it's been useful for running tests on ReactOS, or back when I was using Wine instead of Parallels on my Mac.