The Directory Opus start window is not seen on one of my computers. How do I "turn it on"?
I checked Preferences>Launching Opus>Startup
"Launch Directory Opus Automatically on System Startup" and "Show introductory start window (splash screen) are checked"
Is Opus also opening some lister windows when it starts? If so, that is why.
The startup window will only appear if:
it is enabled in Preferences, and
no listers open when Opus is launched.
From the manual, accessible via the small ? icon at the top-right of the Preferences dialog, or the F1 key:
Show introductory start window: If this option is on, Opus will display a splash screen when it starts as long as no Listers are opened automatically. If Listers are opened on startup the splash screen will not be shown. The splash screen provides links that let you easily open a new Lister, access the Preferences system, etc.