Audirvana 3.4.915 shows location of database in settings page as
c:\Users\MyName\AppData\Local\Audirvana\AudirvanaPlus\AudirvanaPlusDatabasev2.sqlite
The above file does not exist. A search reveals that the file is actually located at
C:\Users\MyName\AppData\Local\Packages\Audirvana.Audirvana-4118-9484-d80dbb7827cd_fec4hfhj3emgj\LocalCache\Local\Audirvana\AudirvanaPlus\AudirvanaPlusDatabasev2.sqlite
A minor matter but eliminating this will reduce future confusion.