I think the problem first occurred with a 10.x update, but that was soon followed by v. 11.0 which I quickly installed, hoping it would work properly. It didn't. Reinstalled with no success.
Clicking the desktop icon produces the "loading" circle for a moment, then that disappears and nothing happens. Also won't launch from the .exe program file, nor in Firefox. Up until recently, Reader always worked well. Any ideas, please?