Agreed, the patch does not work.. I only have one Pano, so only one floor plan set to single floor plan and it shows 'Undefined' unless I add a floor plan to the Tour.. It makes no difference if I set it to Multi or Single..
Let's be more consistent with terminology.
You can have a Floorplan for each Group and a floorplan for the Project as a whole.
With RC1 on Windows 8/ 64- but not Beta 5 Windows 7/64 - I see the problem if I set multi-level in the Floorplan plugin and assign a floorplan to each Group, but don't assign a floorplan to the project.