See images. Not sure how else to explain it better. Somehow the setting are not correct when saving a .exr file it doesn't matter if you try to save it from the max framebuffer or directly render to a file the .exr is not correct. All other formats, .jpg, .png .tif all keep the correct settings and look. If I uncheck the Nonlinear tone mapping box (which is checked) then it completely changes the image in the live view port not desired.
I am not sure when this difference in the .exr may have occurred as we just recently switched to Max 2018 from Max 2017 and we also made the switch from the older version of Octane 3.06-4.33 to 3.06-4.39. It was working correctly in Max 2017 Octane 3.06-4.33. Thanks.