It is possible that the setting has been applied and remembered at the Octane end (not the Modo plugin side) - as a result of an earlier version of the plugin which set OCIO is a different fashion. Try deleting the folders starting with a "{" in C:\Users\[your username]\AppData\Roaming\OctaneRender.
Paul
OCIO error
Moderator: face_off
Win7/Win10/Mavericks/Mint 17 - GTX550Ti/GT640M
Octane Plugin Support : Poser, ArchiCAD, Revit, Inventor, AutoCAD, Rhino, Modo, Nuke
Pls read before submitting a support question
Octane Plugin Support : Poser, ArchiCAD, Revit, Inventor, AutoCAD, Rhino, Modo, Nuke
Pls read before submitting a support question