Here's search results: https://synthiam.com/Community/Forum/Search?query=waterfall&page=1

It's because GoPro drivers prevent any other camera device from working. It's a known issue that GoPro has been notified about by every camera manufacturer on the planet, yet they refuse to fix it.

Uninstall the GoPro driver.

Here's what the internet has to say: https://www.google.ca/search?sourceid=chrome-psyapi2&rlz=1C1CHBF_enCA719CA719&ion=1&espv=2&ie=UTF-8&q=waterfall%20dll&oq=waterfall%20dll&aqs=chrome..69i57j0l4.1753j0j7

Yup, Damn Gopro:(

Thanx:) works now.