WM Capture error: Cannot Run Graph

I bought WM Capture to record webinar screens and the audio that goes with them.

When I try to record the "gotowebinar" window, WM Capture throws an error message "Cannot Run Graph".

Troubleshooting post said to download updated "activeX" and to uninstall WM Capture then reinstall WM Capture.

After following the recommendations, WM Capture still does the same thing and throws the error message again.

I've emailed tech support twice but no response.

Anyone know what to do?