How do I make use of or configure this feature? For example, how to I specific which Unity Editor license (aka serial number) I want to activate and/or return?

I see a screenshot of exactly what I'm looking for, but I don't know how to get to it:
https://plugins.jetbrains.com/plugin/11453-unity-support

How do I make use of or configure this feature? For example, how to I specific which Unity Editor license (aka serial number) I want to activate and/or return?
I see a screenshot of exactly what I'm looking for, but I don't know how to get to it:
https://plugins.jetbrains.com/plugin/11453-unity-support