Shuts Down Upon Start Up

Hello,

I just purchased a membership version of Musescore which up until now has been working great. I've opening up Musescore by clicking on my .mscz files. And it works fine. But I when I try to open the application directly, it initially opens, them goes into non-responsive and then shuts downs and disappears without any further error message. FYI - I'm running a fully update Windows 10 64 bit laptop with Core i7 8th gen, 16 gb of ram and about 200 gb of HDD space.

Thanks for any help you can give.

Mike