Seems long text but real easy and fast…
Start fresh Audirvana by deleting those files…
If you have Playlists that are important export them first to desktop and
save them in a folder… when Audirvana is reset, you can re-import them back in one shot.
sadly to this day, the folders they were in if so, are not back, you have to do them again…
Before doing this, maybe you should not connect after deleting those files to Roon, Tidal or others… Install Audirvana alone with your database… if working, log to Roon or else after.
Apple hide the Home Folder in User Library at some time depending on OS System… When you have clicked your Home Folder, and cannot see the Library Folder in there,
just do a ‘‘cmd J’’ to show the folder settings preferences and see at the bottom… click Show Library Folder and then you’ll have access to the rest forever.
Starting for new Audirvana:
Close Audirvana
Go to the Main Library Folder… PrivilegedHelperTools folder…
Trash All the files in that folder from Audirvana (that folder install SysOptimizer)
Go to the Main Library Folder… LaunchDaemons Folder…
Trash All the files in that folder from Audirvana (SystemOptimizer and prefs files)
Go to User… Home Folder… Library… Applications Support… Audirvana Folder…
Trash All the files in that folder (that is your database of music, back it up! or not)
Go to User… Home Folder… Library… Cookies…
Trash com.audirvana.Audirvana-Plus.binarycookies
Go to User… Home Folder… Library… Preferences…
trash com.audirvana.Audirvana-Plus.plist and com.audirvana.Audirvana.plist in that folder (those are A+ software preferences)
Go to User… Home Folder… Library… Caches… com.audirvana.Audirvana-Plus
trash the files in that folder
Restart MAC. This will reset pretty much Audirvana like new.
Open Audirvana, enter serial, choose a library folder at first it will sync in top middle of main window… LET IT GO, even better don’t try to adjust windows or edit files, even playing music
while it is not finished… you’ll see the progress bar going… Could be long the first time
depending on how large your library is, and MAC is fast or not… go to sleep if it is too long 
then when finished, shut down Audirvana, yes close it before playing a song…
Now open it again, that way it will have saved is database and setting before you make it crash,
you got brand new interface and new sound… Go to Audirvana menu and select preferences… look at them all, then click on speaker icon in the bottom right main window… select your DAC, then the arrow right of it and look at all the preferences there too… ready, click library icon on top right, click cover if you prefer covers over tracks mode… cmd + or - will make them bigger or smaller… click a cover to see it songs… do cmd i to see the info panel of that album, click a song and select them all with cmd A and do cmd i to see all their infos to be edited by you if needed… double click a song and listen, be happy