Matrox and Boinx

I have a Matrox MXO2 LE Max that I’d like to use with BoinxTV but Boinx keeps erring, saying ‘The device “Matrox MXO2 LE TAD99647” could not be opened because it is in use by another application.’ When, as far as I can tell, only Boinx is running. Anyone have any info to help me with this? I’m using a Macbook running OS Yosemite.

Anyone? Please? Help!

Anyone have the Matrox - boinxtv documents?
These are unavailable in the Boinx website…

Still no info on this error message? Does Boinx Tech support read these messages?