As a recently resuscitated thread clearly indicates, the use of the terms "hiding" and "hidden" easily leads to the inference that resources are not deleted from one's install when dragged to the "hidden resources" section of program settings but are merely "hidden" from the library.
Such confusion about the nature of this poorly chosen name for this program function was easily seen throughout Beta testing and has arisen constantly since v4's release.
The choice of "hiding" to describe "deleting" has also meant that a word has had to be made up to describe the reversal of the process... I shudder each time I encounter "unhide" or "unhidden"....
Please rename this function "Delete" and its counterpart "Restore"