Can you be more specific about the version of Qlikvew? open Qlikview > help > about Qlikview, can you please provide the whole build number?ex. 11.20.XXXXX.
This will determine if this a bug that we are aware, so you can update to the latest PE of Qlikview.
In PE v10, if I had used all my recovery attempts and created a brand new document from scratch, I could still open it. PE v11 will not allow me to do that even though it is on a completely different machine that has never had any Qlikview software on it.