Why won't LO 5.1 open a document?

LO 5.1 stopped responding, causing my open doc to corrupt. Then it failed to repair it. I have uninstalled LO and reinstalled it. The doc I need will not open still. I received it as docx, worked on it, and saved it as odt. I have tried to open the same docx file I downloaded before and the odt file I saved it as, but every time LO hangs forever with the message *Not Responding," so I have to close it. I can see the text in the Windows Explorer preview pane, so I know it’s there. I can create, save, close, and reopen other files. How can I get this file to open?