Display .exr in natron just like in a blender

Hey. I am sorry that the question is not about the blender, but it seems to me that they can help here. I have a problem - I saved my render after luxrender in png and exr format, and when I open png at viewer and exr in natron, the result of the render in natron is different from how I see this render in png. The problem is in color space, but I’ve been trying to pick it up for an hour, but nothing comes out of it. Tell me please.

Unfortunately, I can’t show a render, but what I see is either increased contrast or a wrong gamma.