Adobe Flash-based applications will no longer run as of January 12, 2021. As a result, the StreamCatcher software is not currently functional. StarTech.com is actively working on a solution to make StreamCatcher functional again as soon as possible. In the meantime, Open Broadcaster Software (OBS) is a free, alternative application that may be used. Instructions for using OBS with your StarTech.com capture device can be found here.
More information about Flash support being discontinued is available here from Adobe.