How do you install and enable colour sets?

[Darth C3P0]

I'm pretty sure if you have RTB in your folder the colorset manager will be there.

I remember first hosting WITHOUT RTB

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[Darth C3P0]

I remember first hosting WITHOUT RTB

And it being there

[Shift Kitty]

Ok, take RTB out of your add-ons and see if it's still there then.