I have similar problem (though with different card). I updated drivers from 7.9.5 to 8.0 for my Decklink SDI (during the instalation firmware upgrade was requested) and now card isn’t shown in Device manager and it doesn’t work anymore with Flash media live encoder. Replacing back 8.0 with 7.9.5 (or any older drivers) didn’t solve the problem.
Is there any other way to downgrade firmware ? Or any other advice how to get it back to work ?
Thanks in advance
Vlada