I can click Play and footage plays fine. I can click to any point in the timeline fine. I can track with no problems. What I can’t do, is scrub the timeline at all; it isn’t slow, it just hangs. This is true for any resolution footage. If I try to scrub the playhead, Mocha AE freezes. I’m fine on RAM, my graphics card is robust (Nvidia K6000), running After Effects CC 2014. Any ideas would be most welcome.