Change default camera on Macbook

My bank asked me to install a plugin for a video call (RTCCVCam by SightCall).

This plugin worked correctly with their software, but somehow became my default camera setup. I want to set my regular FaceTime HD camera as default.

This is somehow unimportant with apps where I can easily select the camera (Slack, Skype, ...) but for software where I cannot do that (e.g. evernote), it's a major problem.

So far I couldn't figure out how to uninstall the plugin, nor how to set the camera by default for the whole system.

Any help?

Thanks a lot!