When choosing my device in Final Vinyl, I don't see the iMic (Final Vinyl 2.5.1).
If you do not see the iMic as a device option in Final Vinyl's preferences, just quit Final Vinyl and reopen it. When making a recording with the iMic in Final Vinyl 2.5.1, the iMic needs to be selected as the recording device in the Final Vinyl preferences. If you do not plug the iMic in before opening Final Vinyl, it will not appear under preferences. You can see a full demonstration on how to setup the iMic here.