Seconded, I'm running Edge in Win10 and the game defaults to the old version.
I pointed this out somewhere else and all I was told was "Update Edge"
Now I'm not sure if the Nordeus guys are aware of this, but by and large Win 10 updates everything automatically overnight, which is a pain in the butt when you are downloading a freaking huge file and your PC restarts
I have 2 teams, one is playing in FireFox in the new version, one is playing in Edge in the old, I'll be darned if I download another browser just to allow me to play both in the new.