I have this iPad app called AVPlayer. I used to plug-in the iPad and copy files to the app using iTunes. However, this doesn't seem to work in the newest version of iTunes. There used to be a feature called "file sharing" that allowed to do that, but it seems to be gone now? I can still navigate to the "apps" panel, but AVPlayer doesn't show up there, in fact there is no app that would allow sending files to it, and no such option at all.
So the question is: how to send files to an iPad app via a usb cable?