I was sorting music on iTunes when I noticed in the top right that it said it was downloading something. When I checked, it was Adobe Photoshop Sketch, an app I had downloaded for my iPad earlier today. But why is it downloading it? Can I delete it from my computer?
Windows 7
Enable the menu bar with Alt or Ctrl+B if currently hidden.
Use Edit > Preferences > Store and review your options for automatic downloads.
Note
A feature introduced with iOS 9 referred to as app thinning or app slicing allows each device to download only the code and resources needed by that device, resulting in smaller downloads and better use of storage on the device. As a consequence the device no longer holds the universal version of the app that could be installed on any device so transferring apps is no longer supported. Hopefully Apple will make some changes to the way this works, but in the meantime you can download past purchases from iTunes and/or enable automatic downloads of app purchases to make sure that iTunes always has the apps that you want on your device. As long as you make sure all apps are present and updated in iTunes before attempting a restore there should be no loss of data. I can't confirm, but it seems a recent update means that all data is restored and apps that are not in the library are queued for download from the iTunes Store over Wi-Fi, in a similar fashion to the way restore from iCloud works.
You may wish to consider whether automatic downloads of your purchases is actually desirable after all.
tt2
Why is iTunes downloading an app?
