If you are using Publisher, you can get that info from the
Qlikview Cookbook: QVPR Analysis http://qlikviewcookbook.com/recipes/download-info/qvpr-analysis/
The Qlikview Governance Dashboard has this as well for Publisher.
You can download governance dashboard on: http://www.qlik.com/us/explore/products/governance-dashboard
Governance dashboard supports to scan the specific directory and get QVWs' info. The help doc of governance dashboard can support you more details.