Audirvana 2.6 will not play any tracks on Hard Drive

I am suddenly unable to play any track from Audirvana. Any track I play briefly flashes "Optimizing system audio "and then “Loading first track…” and then nothing happens. When I click on “Track Details” I am able to pull up the linked file on my external hard drive (from within Audirvana) and the track will play on my Mac preview function (space bar) with no problem. I ran a disk repair and the hard drive is fine. Other Flac/mp3 players (Swinsian, itunes, etc.) play my library with no problem. Please advise. Audirvana was my go to/favorite player.

My program is licensed. I encountered this problem with 2.6.8 an then updated to 2.6.11 and the problem continues.

You could try to go through the three db maintenance steps
Check db integrity
Rebuild indexes
Defragment db

Thank you. Ugh, I have an enormous library and finally had everything scanned and optimized. I guess this would be my last resort if there aren’t other suggestions.