Can only see in fullscreen after macOS Catalina upgrade

I feel like this is probably a dumb question, but since upgrading to macOS 10.15.1 when I open NoSQLBooster, no window displays. It shows in the top bar with the full menu, and in the app switcher, but no actual window on any desktop or in Mission Control. The only way I can get to the application window is to open it, and then from the top menu select View > Toggle Fullscreen. It will then show up in fullscreen mode, but if I toggle it off or try to minimize/maximize it disappears again.

I've tried different options in the dock, upgraded to 5.2.7, rebooted, Options > Reset to Default Settings. Does anyone have ideas on what I'm doing wrong?