Have you checked with the manufacturer? Nothing is driver-free...that just means it's using a generic driver included with Windows.
If you can't locate any updated drivers, and Windows has all updates installed, you might try uninstalling icamsource, and install the older version that you used successfully. I don't think the icamsource update changed how it gets video from a camera, so that is weird.
I'm sure the SKJM guys will have more insight, since it's their program.