I've been having issues with the Premiere Beta since build 44 and it continues in build 45. Whenever I open a sequence up, the program monitor is either black or frozen over the last frame the playhead saw. It becomes unresponsive to the point where nothing can get it to work properly. I'm gonna try to trash preferences, clear media cache and more for troubleshooting but I wanted to get this info out there in case anyone else has some insight.