notification concerning Fold saved application state will not go away

For no apparent reason the following notification appeared this morning when attempting to start the application:

The last time you opened LibreOffice, it unexpectedly quit while reopening windows. Do you want to try to reopen its windows again?

At the bottom of notice 2 choices are given (1) open (2) don’t reopen

Neither choices respond to selection

I am a new Mac user and “lost”