First of all you need choose correct plugin library:

• Unity 4.6 require Build/UnityEditorConsuloPlugin4.6.dll
• Unity 5 require Build/UnityEditorConsuloPlugin5.dll
• Unity 5.3 require Build/UnityEditorConsuloPlugin5.3.dll
• Unity 5.6 (or highter) require Build/UnityEditorConsuloPlugin5.6.dll
• Unity 2017.2 (or highter) require Build/UnityEditorConsuloPlugin2017.2.dll

And then copy it to Assets/Editor/Plugins directory.

And just set in External Script Editor in Unity Editor

Required last Consulo & Unity plugin builds