Endless Space used to run fine on Windows 8.1. Installed Windows 10. Stopped working.

When I select 'run game' all I now get is a 'user account control' alert, click yes (or even no), then Steam says the game is 'running' for about 3 seconds, then 'synicing' for a split second, and then crashes. Game window doesn't open. No notices or alerts of anything from the system.

Have checked Game Cache
Have checked Graphic and Sound Drivers
Have Uninstalled and Reinstalled game

Used to be one of my favourite games. Probably quite a petty fault, as I'm not massively techy.

Any help would be really appreciated.
Thanks :)