It seems you are running the Personal Edition of QlikView Desktop. Something similar happened when version 10 came out when opening version 9 files.
First, open QlikView and try going to the start page, right click on the document you want to open but select instead "Open Without Data".
What worked with version 9 as well was uninstalling existing version 9, removing all Windows registry keys containing "QlikView" or "QlikTech" and corresponding folders (backup your data first if your files are in the same QlikView folder) and then installing version 10. You can give a try with version 11, but I have not tested it.
If this does not work, I'd contact firstname.lastname@example.org so they can help you migrating from version 10 to 11.
Hope that helps.