Hi @tbelgrave.
I supposed that you have downloaded a custom config.ocio from some user from internet just as me, since our presets are the same.
To add Utility - Curve - sRGB, copy the following code and paste inside config.ocio, at end of the file. Any plain text editor is enough to open the file:
PLEASE, keep the spaces. One blank line before the whole code and two spaces before the dash.
- !<ColorSpace>
name: Utility - Curve - sRGB
family: Utility
equalitygroup: Curve - sRGB
bitdepth: 32f
description: |
The Curve - sRGB color space
isdata: false
allocation: uniform
allocationvars: [0, 1]
to_reference: !<FileTransform> {src: linear_to_sRGB.spi1d, interpolation: linear, direction: inverse}