Game initially failed to find the update servers, so had to restart both PC and router.
Game then failed to update, so I had to re-install from scratch. 5 hours later and after taking an age to unpack the files (90%-99%) the Launcher will launch and say that all is well and that I am running the latest client. I click the 'Play' button and the initial screen loads but after 3 seconds or so the game crashes and a Windows Program Crash window opens. Same with Safe Mode, just about loads the screen then crashes.