Navigate to Protools, Setup menu and click I/O. Select the Input tab then delete any paths that are there, once all paths are deleted click default (located at the bottom of the I/O window). Select...
All enquiries about the Command 8, Mbox, Control 24, and D2/ D3 plug-ins are taken by Avid (Digidesign). Their contact details can be found via the support section of their website here .