Audirvana will not recognize new HD music file - need some help


I am a fool when it comes to Audirvana.  I had an external HD synched to my iMac playing through Audirvana, but I just recently put all my Hi-Rez files on a new HD and Audirvana will not recognize those files, it only shows the files on the old HD, which is disconnected.  I have spent a few hours trying to figure out with no success.  The new files are in FLAC format.  Any help would be appreciated.  Thank you. 
whitestix
You have to add the HD and location of the file to your Audirvana library. Go to preferences in the app. The library options are in there somewhere.
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Yep, I did that but it still won't play.  It seems to balk when I try to sync it to the new location.