It's not possible to change the order, at the moment. I've been planning to overhaul the overlays system for a while, but it's not a small task. Can you send through your crash logs to support@inklen.com (as well as a little detail on the issue, so that I can track it more easily)? MixEmergency shouldn't be crashing when switching video sources. To find the crash logs: 1) Go to the Mac OS X Finder. 2) Hold down the "option" key then in the menu bar select "Go" > Library. 3) In the window that opens, navigate to the folder named "Logs", and within this "DiagnosticReports". 4) Send any files that begin with MixEmergency, or com.inklen.MixEmergency back to me in an e-mail.