Asustor Nimbus 4 won't play avi files

I’ve just updated to the latest version (1.19.1.2645-ccb6eb67e) and all I’m seeing is blocky images on my screen. I’m not even getting audio with this version now. Is there anything anyone can recommend? I’d like to stay current but for now it looks like I’m going to be stuck on version 1.18.0.1944. Someone in this thread came up with the issue AS5304T HW Tanscoding is not working properly but it doesn’t look like it has been fixed by the plex people yet.