I tried both. Initially to existing backup folder then to a fresh clean folder. First try to restore didn't find the added files that sat as a fresh folder named with the artist name after the existing backup folders, then, to a fresh folder I get "not a valid backup folder"

Geoff

861v4-LPS, ID40, MC200, Roon, Tidal
DSP7000, DSP5200HC, DSP5000.3, Oracle Delphi IV, SME V, Dynavector DV17mk3.
Mac Mini(2010), Synology NAS/Plex Server
Schitt Lyr, Audeze LCD-2, Sennheiser HD800, Beyer Terminator v4.
Oppo BDP-93/Vanity93Lite, Sony PW-10, Grandview 100" screen