I have the same problem. After 5-th of 6-th recorded file (mp4, AVI), DEBUT displays error:
"The device is opened by another program, Please close all programs that might be using the device and try again."
When I restart the software, it works great, but after 5-th recording the errot apears again.
I'm testing DEBUT with WIN XP and WIN 7 64. Caprure device is: 4xHDMI PCI-E, SAA 7160 capture card.
Radek