I have just updated my Libre5.2 and my files will not open. I am using Windows 10,

I have just updated my Libre5.2 and my files will not open. I am using Windows 10.
What do I do now
?

What means “will not open”? Nothing happens on double-click? An error shown when open from FileOpen? All files? Or maybe only ODF? Or DOCX? Or XLS? or what?