The Pepper Flash interface is used on Windows, Linux and Chrome OS. Internet Explorer was and wasn't updated. For Edge on Windows 10, see Enable Flash Player for Edge on Windows 10. weblink It's taken a couple of hours but I've managed somehow to get it reestablished - and then quickly rebooted the machine to hopefully lock it in place.
What happens? Now, this is more of a Flash cheat sheet. Operating SystemBrowser(s)Latest Flash Version WindowsAll browsers 126.96.36.199 Macintosh OS XAll browsers 188.8.131.52 Chrome OSChrome 184.108.40.206 LinuxChrome220.127.116.11 Chromium-based browsers18.104.22.168 Firefox22.214.171.1246 May 19, 2016. If the Firefox version of Flash is not installed and you open a PDF file that includes Flash (SWF) content, a dialog will prompt the user to install the latest Flash
For instructions on how to install the Flash Player on OS X, as well as troubleshooting, see Flash Player installation problems on OS X from Adobe. Websites that need Flash can still use it, but the end user has to first okay this by clicking on the area of the page devoted to Flash.