libreoffice hangs when I try to open a file and can't be uninstalled

Installed LibreOffice on Windows 10. When I try to open .odt files that I’ve previously created, it doesn’t open the file and when I click on anything, I get the “Not responding” message. I’ve tried uninstalling (so I can reinstall), but I can’t uninstall it, either through the LibreOffice installer, or from Windows Settings.