I am only getting
"Use of getPreventDefault() is deprecated. Use defaultPrevented instead."
I used different browsers, disabled addons, turned off or disabled security programs, cleared cache, cookies, history and restarted computer.
I can download the Capx, but I can't the Plugin.
The browser acts like it is trying to call the download window, but it is as if it can't grab the handle.
All I can think of is maybe DropBox did something that only effects some users, or maybe bad cache for a few of us.
Maybe if we wait a while the Cron will run and clean up..