This is an odd one, yesterday I added a tenth camera to Blue Iris. Now when trying to playback using the 'replay' button next to the timeline or double clicking the actual timeline, Blue Iris simply crashes in Windows 10. I can double click and play 'alerts', can also playback 'all clips' without issue. Nothing has really changed apart from additional camera, I even tried updating to latest Blue Iris release, still no joy. Was fine with nine cameras and now suddenly ten seems to have caused some issues, makes no sense.