Have a look at the link I gave earlier. That is "most likely" the reason you can't downld. We get lots of similar posts with same symptoms. Set your Popups to default & also, go to Searching & disable show license option.
The reason no window pops up is b/c you must have chosen at some stage to click the "always use this answer" thus you aren't asked again ... the window stops popping up. You clicked NO & then clicked always use that answer. That's why you can't downld anything.