Override HSV.zip
(Installation: extract the .zip and run Install_OverrideHSV.bat. Alternatively, copy Override HSV.dll to your Effects folder)
This is a simple plugin which allows you to edit any of the HSV channels and set all pixels to any value you wish.
You could think of this as the typical hue/sat tool except rather than adding/subtracting, you are overwriting channels with a certain value.
Access it from Adjustments > Override HSV.
The UI provides 3 sliders with checkboxes to enable them.
Example image for comparison
Setting hue of all pixels to 0 (red)
Setting saturation of all pixels to 100%
Setting the value of all pixels to 100%