I updated my GPA version from 2014 R2 (gpa_14.2_221091) to 2015 R4 (gpa_15.4_release_276272_x64_standalone) but It doesn't work properly.
The RenderTarget previews on the left seem to be okay but most of them are staying black when I select them in the Rendertarget window.
My application uses DirectX 10. I have an intel HD 530 with driver 10.18.15.4281.
Sorry that you are running into this problem. There have been many changes since 2014 R2, so it is possible there could be a regression.
If you could please private message me with the frame you are trying to look at, we can get to the bottom of the issue faster.
Also, if you could post your "graphics monitor -> about" dialog here, that would be great.
I got your message and received the frame from the DirectX SDK sample.
I am able to reproduce the issue and have made a defect for this in our backlog.
I'll message you about the ETA on this fix as soon as it's scheduled.