@Cugel666 It seems pretty weird, did you install the plugin from the epic launcher or do you have a custom engine?
The steps listed on github are just for custom engine. And if you have no “Plugins” folder inside the root of your project (where the .uproject file is), you have to create it and then put the “ElectronicNodes” folder in it 
But if you use a “standard” engine (I mean, not a custom one), you don’t need it, you just install it from the epic launcher and you’re good to go! If the compilation fail, could you give me some logs on the failure?