there is no options for the skinned electrical furnace

I will look into this later this week. In the meantime, you can try adding the prefab to the config.

Thanks! I tried adding IndustrialElectricFurnaceIO into the code:

Line 331:

private static bool IsHybridIOEntity(IOEntity ioEntity)
{
    return ioEntity is ElectricFurnaceIO or IndustrialElectricFurnaceIO or MicrophoneStandIOEntity or ComputerStationIO or Hopper
        || (ioEntity is SimpleLight && ioEntity.GetParentEntity() is WeaponRack or FlagTogglePhotoFrame);
}

Line 836:

// Has no pickup entity.
["microphonestandio.entity"] = new EntityConfig(),
["electricfurnace.io"] = new EntityConfig(),
["industrialelectricfurnace.io"] = new EntityConfig(),
["computerstation.ioent"] = new EntityConfig(),

I'm not sure yet if this actually works, but the plugin loads without any errors and industrialelectricfurnace.io is also being added to the config correctly.

I haven't tested it in game yet, I'll test it tomorrow. :D

You shouldn't need to edit the code. Just add this to the config under the Entities section.

"industrial_electric_furnace.io": {
  "Require permission": false,
  "Generate power amount": 3
},