Highlight RemDim - Changing to Enabled Status

ION running 2.0.1 golden

In Manual Control Setup I can not change Highlight RemDim to Enabled.

Selecting the Highlight RemDim field either via keyboard or mouse does not change value from Disabled to Enabled. Have attempted change with and without Highlight activated in command line.  Have also default vales or arbitrary levels to Highlight, Lowlight and Live RemDim Level prior to attempting to enabling Highlight RemDim.

TIA

Stoney

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