Is there already, or is it technically possible to create, an app to verify that games in WUP Installer format (i.e. *.app, *.h3, title.cert, title.tik, title.tmd) have all files present and correct? I had a problem installing a couple of titles, which after a lot of checking (and unnecessary reformatting of SD card with different cluster sizes), turned out to be a corrupt downloaded .app file. It would be great to be able to verify these downloads before trying to install them. If you only find out about a corrupt .app at install time, you end up with a partial install, which can be a pain to remove. I can imagine use cases for such a verifier app on both the Wii U itself (could be bundled into WUP Installer), and on a computer for "offline" verifying. I don't know enough about how it works to know if it is even technically possible to verify on a computer, e.g. using the info in the various title.* files to check the *.app files.