Error when spoof ip

[roysG]

First of all this is awesome app!
But, there are some errors when i start spoofing.

The error i get:

Spoofing target 8C859049DFF3 @ 10.0.0.27
Added 10.0.0.28 @ 4C:66:41:56:38:60 from background scan!
Exception thrown: 'System.IndexOutOfRangeException' in CSArp.exe
Exception in ApplicationSettingsClass.GetMACtoClientNameDictionary()
Index was outside the bounds of the array.

One more bug, the app block all the networks even those i not targeted