The Microsoft Store has a "Surface" app that is supposed to allow customization of the pen -- the pressure sensitivity and the top button in particular. On my fully up-to-date Surface Pro 3 (i5 256G), the Surface app fails to connect to the pen, and instead shows a message on each of the screens designed for customization. The message says: "The Surface app could not connect to the pen device. There may be a problem with device metadata or driver may be open by another application. From the Start screen type Devices, tap or click Devices and Printers, then tap or click Refresh three times (circular arrow next to Search box).". This does not change anything, cold boots don't change anything, refreshing from Device Manager doesn't change anything. I called Surface support and had a 1.25 hour chat with Surface support, and neither place has any idea what might be causing the problem. (All I got was a case number.) Over time, I've tried deleting the pen entries in device manager and bluetooth and rebooting, and I've tried reinstalling all the firmware and driver updates, but not found any change. (After each such excursion I restored an image of the system before I tried all of this ad-hoc fiddling.) Does the Surface App actually work? (Probably for most it does.) If so, have you any idea what I might try to make it work on my machine?