This was an excellent plugin until the developers decided to change the name. Then many experienced issues with it. I experienced one of the worst issues that can happen to someone who's not a programmer: I was totally locked out of my website and I had to fix it on my own. That's because no matter how much I tried communicating with them they never gave me an answer. If they want profit by selling tech support they should turn the plugin premium, not riddle it wih issues so people are forced to buy their support.
I recommend that you don't install this plugin if you can avoid it.