Yeah, I wasn't quite sure. Last time they released an album was only 2 years ago and William said something about how a 7th Aiden album is still planned before the band officially calls it a day.
Although this is on the Wikipedia article for their last album "As of December 2012 the album has sold 5,000 copies, with critics deeming it a financial failure"
Maybe it's better they just end it. that's an awful sales figure considering how big they once were.