MediaBay: HALion 4 Factory Content missing

HALion 4 stand alone and as VST inside Nuendo:
HALion 4 Factory Content is showed together with HALion Sonic Factory Content and HALion Sonic SE Basic.

Nuendo MediaBay:
Even after several rescans, HALion 4 Factory Content is not showing.

Any idea what the problem may be?

Just a shot in the darkā€¦

In the Mediabay -> Define Locations: make sure that the checkbox corresponding to the Halion 4 factory presets is activated, ensuring that the folder is scanned.