My computer upgraded last night to the latest version of Windows 10. This morning I have been unable to open any document in Libre Office. I get a black window. How can I fix this. I have thousands of files I am working on.
I have downloaded LIbreOfice and reinstalled it. That has fixed the problem.
For the record, it looks likely that you got the OpenGL bug. Fuller details in Q64314. Glad you managed to fix it by reinstall.