OK... my bad... When I activated the GPU, the node was disabled. That's why I get only one part of the image. It's now working great, even with manual load balancing. Thanks a lot for your addon, That was very annoying to switch from laptop to desktop, and I can now use 3 computers to accelerate my renders. I will speak about crowd-render to the community, it's awesome :)

I've got the same problem with blender 2.81a and the addon that I downloaded today. It seems that the rendered part from my computer is not sent back to the main instance. I needed to force the load-balancing method to make the remote instance more important (it's the GPU instance), I didn't try to use automatic balancing as the addon want to make my local blender instance too important (and it takes too long time to render) Also, if I leave the automatic LB, I see weird value: 1 + 0.5 = 1.5 => if i want to setup manually, I can't have sum above 1.0. Is it normal to have "automatic" values that way ? Anyway, thanks a lot for your work !