Is anyone who is having problems running on Windows 10 and did you by chance have a big update recently? My game was working ok last night, but then overnight my laptop installed a big Win10 update. After that I was getting a DirectX error every time I tried to log in from the launcher. I was eventually able to get into the game by switching from DirectX 9 mode to DirectX 11. The game seemed to be running fine for the evening after that, but when I logged out it gave me a black screen and some more DirectX errors.

Unfortunately, I didn't write them down. If it does it again tomorrow I'll make a note of them. I just thought I'd throw it out there in case switching from DirectX 9 to DirectX 11 (or vice versa maybe) might help some people get in...

I may try rolling back the Windows update if the problem continues.