I played a round with an old friend last night who suggested trying the newest flash version, since I was sticking with trusty 11.5.502.110 that has always worked so well.
And I have to say, with 21. something the meter is miles better. It appears Maxthon with Win 10 works with the latest version installed.
Andy, sorry to hear of your Win 10 woes. For me the switch went seamlessly, apart from the meter issue that is now fixed. I wasn't keen on the tablet style presentation but a program called Classic Shell gave me the old start menu back.