Currently I need to do some movements that were possible in HMM11 but are not in HMM12.
I would like to have possibility to drag and drop (tracks or folders) in Music Explorer > Library Tree.
Can you please specify more in detail what oprtation you did in Helium 11?
To move tracks or even an album folder just drag and droping to another folder. Just that.
Dragging tracks to folders (copy or move if shift is down) will be included in our next release.