Well.... It's responsive when you use it. When you're finished with the look and you press OK to close Magic Bullet, then it appears unresponsive. Does not close window and all the work you've done in Looks is wasted. You then have to force quit and restart the app. So annoying.
I am using Premiere Pro 2021 (most up to date version) because 2022 doesn't support HEVC files. I am running the most recent version of Magic Bullet Looks / Red Giant Complete.