Cursor turns to a black square in the menu areas, but not in the PDF area
This has just started today. I have restarted my computer a couple of times, but that does not help.
The cursor is fine when it is in the main PDF area, but if I open up the left panel and go there, or move the cursor up to tool bar area it turns into a black square, about a 1/2" x 1/2".
It is still responsive to clicks. I have learned that it is the upper left hand corner that is the point of the cursor.
Anyone else ever had this? And if so, what was the cure?
Thanks for any help.