Gamma Override not working in Save Dialog

Hi all,

I don´t know if someone asked this question before - search failed for some reason.

As the title says, the gamma override is grayed out in the file-save-dialog, when entering a filename in SR. Any Idea what causes this?

Flywiz 1.7.2 MOAWiz 1.3.2 and SR 2.05_max 2013-2018_full
3dsmax 2018, Vray 3.6.04

When I enter a filename in the render-setup, I can set the override as usually.

Any advice?

Cheers!