.qvw is not a data file format - that is read with the Folder connector. A .qvw file can be used with Qlik Sense Desktop to be converted to a Qlik Sense App - .qvf file. It will take the .qvw and rename it to .backup and create a .qvf with the script and the data model only - the visualizations will not be converted.
Note these screen shot - using Qlik Sense Desktop 1 SR 1 (1.0.1) - even by selecting all files (as .qvw id not in the list) - the data load table viewer does not recognize the .qvw as a readable format.
Please check out these videos to see how to load data from a .qvw:
You are talking about the desktop version. There I can load a QVW file without problem:
The question I have relates to the server version of QlikSense. There I get the error mentioned earlier and I fail to understand why.
Your videos links are helpfull (I was aware of those already) but do not solve my issue I believe. Creating a qvf file in the desktop version does not help me as I can't load in there (if I believe the list of file extensions), or do I miss something?