Upgraded from Catalina to Big Sur. LibreOffice won't open

“Finder” shows documents, but won’t open. LibreOffice icon in doc tray and as app in “Finder” but won’t open. Help - recovering from Covid-19 and need access to medical history files (.odt)

Google search found answer - LibreOffice must be upgraded to 7.0+ to operate with Big Sur. I think I just got that done.