I just logged-in to my system and waited-out the login items starting up.
Last night I had logged out with the Visor pinned; after login there was no Visor showing, nor was I able to invoke the Visor by any key combinations.
Went to TotalFinder Preferences and Unchecked FreeForm Visor Window, a pinned Visor window appeared.
Re-checked FreeForm Visor and everything works as expected.