Adobe Reader DC won't open

When I try to open a file using the FILE-OPEN on the home page a previously used window opens. But, if I try to open a file or change the directory up one step the program crashes. I can open a file listed on the HOME page or from Windows File Explorer. I have version 21.011.20039 64bit on Windows 10 64bit. I have tried to repair the program and restarting my computer, neither work.