Roon no longer seeing my 2 blue sound devices

I am having problems playing files stored on my buesound Vault2 - particularly HD files which keep crashing. So, i shut down my mac (Roon core/) and tried playing the HD files using the blue sound app. They work fine.

When i restart roon it is no longer seeing my vault 2 or ny power node 2

  1. How do i re add them to roon

  2. and more importantly how do i get audio to play correctly via Roon once i have added the blue sound devices back ???