Changing an existing sequence's settings is causing Premiere to freeze. I've been having this issue for about a month. If I want to use different sequence settings I have to start a new sequence, otherwise, the spinning blue circle appears by the mouse hand, the screen goes white, you can choose to "Wait for Premiere to respond" but ultimately you have to force quit the program. This applies to dragging and dropping footage into the timeline (when you're given the option to use the footage's settings or keep existing settings), as well as going up to the Menu bar and changing the settings manually. I've used Premiere for years. This seems to be a new issue.