Are you sure that the path is correct? You could also try to open the app per batch-statement, per binary-load from another qvw or per vbs but the chance are rather less. A further possibility to extract some information/work could be to read the qvw as xml but to disentangle these informations could be more work as to create the app new.
Do you have section access in this application ?It's Possible to be a reason for the fail.
So, in this case, try to open the application with another user.
Another option is to open the application without data. Because It's possible to has a problem with some report and all application fail, because you cannot load one of some reports.
Please write me what's will happen, because this is very interesting case and I know how much is bad to be happened you.
Try with this utility.
Once installed go to your folder where your .qvw is saved right click on it and go to RightQlik option --> open without data.
Let me know if that helped.
RightQlik.exe 20.5 K