Acrobat is not responding and shows a running instance error in June 2026

I am only using Adobe Reader and this problem just surfaced recently (I assume it has to do with a recent update). I can open the pdf files with MS Edge OK (which I don’t want to use). The error says “something went wrong” then it says “A running instance of Acrobat has caused an error”  when I try to open the pdf with Adobe Reader like I always have. It is on a WIN10 desktop. 

Ron