I'm trying hard to create contributions for you in return, guys, but I'm puzzled.
So far, I am only able to make changes in the image itself (after sending it to the editor).
If I try to copy an existing image into the image itself, Photoshop creates a new layer. Even if I delete the original one or if I merge the layers, the system doesn't recognize the newly created image (after receiving it from the editor).
I tried the trick with the "alt" and "cmd" buttons pressed, but again an extra layer is introduced.
What am I doing wrong? Please... help.
Btw: I'm using ThemeEngine 1.0.0 and running macOS 10.13.6 (High Sierra).