Can not trim a video. I import a 4K video. I drag the video to the timeline. I select trim and move the slider to the starting frame. I see the starting frame and click the indicator for the frame I want to start on. Trim freezes up from there, I tried uninstall and reinstall. It still does not work. Running latest version from 365 subscription. I have over 300GB of free disk space and can not see any reason for the freeze. It happened on two files now.