After updating Photoshop CC2020 to newest version, as of March 2, 2020 I have had several freezes and must force quit. Downgraded to 21.0.3 and it got worse. Lost prefs and launched to a blank dialog for opening new files. Photoshop is now not usable. Update: totally uninstalled, re-installed 21.0.3 and now seems to work.