Update left me with black screen

After the recent up date to Lightroom the first time I go in and try to use it my screen is completely black.  Doesn't bring up libraries, let me add, nothing. I thought maybe a sign in issue, but I can't even do that.  Anyone else have this issue recently or any time before and have a fix for it? I'm on a deadline to get through 9,000 sports photos this week and this is NOT helping me.