On Mac Calc not opening properly after Mac OS 26 upgrade

After OS 26 upgrade Calc files no longer open as previously configured. Instead the Libre Office splash screen flashes by. Then the default Open a file/application screen opens and closes, then my file opens in a reduced window. I then must resize the window to work with the file. Very annoying. Changes not retained. I must redo this every time. I’ve been useing L.O. calc for years. This behavior is new and correlates with Mac OS 26 upgrade. I can restore normal behavior temporarily by moving L.O. app to the trash and re-running the installer. But if I reboot my system the erroneous behavior returns. Bob Schmidt irontopp18@gmail.com