How to import shader from older PPSSPP version?

[Arthandas]

1.3 had the "simple scanlines" shader which seems to be absent from 1.4.2. I copied the "SimpleScanlines.fsh", "SimpleScanlines.vsh" and "testshader.ini" files to the "shaders" folder and the shader appears in the shaders list but enabling it doesn't change a thing. Am I doing something wrong?

EDIT: Ok I figured it out, it simply doesn't work under DX11.