Replace the lines 454 and 455 in QuickToggle.cs with these two:
- normal = new GUIStyleState() { background = EditorGUIUtility.Load("Icons/sv_icon_dot5_sml.png") as Texture2D },
- onNormal = new GUIStyleState() { background = EditorGUIUtility.Load("Icons/sv_icon_dot3_sml.png") as Texture2D },