Can I please declare my ignorance as I cannot find Amped Elektra in the media bay nor the ‘media’ window on the right hand side of the project window (presumably the same source).
I have ‘Amped Electra’ (the new free download for C12 users) showing in the Steinberg Library Manager and ‘details’ button shows the location folder (also confirmed by opening in explorer) is the same as the Novel Piano, but the Novel Piano does appear in my media right hand window. Actually, there are only 4 icons in my right hand media window under Halion Sonic HE yet there are a handful more in the steinberg Lib Manager under Halion sonic.
Could it be my media window has an issue and needs rebuilding somehow?
In Media Bay (F5), I have ticked that folder where all those files are:
C:\Users$$$$\AppData\Roaming\Steinberg\Content\HALion\VST Sound
Any help for this moron would be much appreciated 
UPDATE:
I have found a great resource by a helpful poster at :
so I can now see the ‘Amped Electra’ piano in the main Halion window (albeit still not in my right-hand media window).