How can I know when the driver has been installed? There isn't any notification or something, neither my device reboots. And again, the program still captures microphone audio when it shouldn't, if I select Internal Audio is to record only Internal Audio, so I guess that its a bug.
From what you're saying it looks like your device is using some incompatible audio driver and there is not much I can do about that
I keep working on improving compatibility but it's extremely time consuming especially without physical access to the device, so don't expect fix soon.