It can be in two different locations :
C:\Users[your login]\AppData\Local\Packages\Audirvana.Audirvana-[… id number that can vary]\LocalCache\Local\Audirvana\Audirvana
C:\Users[your login]\AppData\Local\Audirvana\Audirvana
Unfortunately you will have to do this. Do not forget to do a backup of your favorites and playlist using the back up button in the Local settings of Audirvāna.
I deleted Audirvana completely , removed the Users/Audirvana folder and then reinstalled
It is still scanning but everything is looking much better. I will wait until its finished scanning and report back. The drive has 3Tb of music to scan
I didn’t have ay playlists set up so no worries there.