To make a long story short, it appears that the check box for "Remux videos with tsMuxeR when possible instead of transcoding" went away between 1.72 and 1.70.1. I uninstalled 1.72, installed 1.70.1, and the check box appeared. I unchecked it and can now play MKVs again.
Did I miss something or should I just be happy sticking with 1.70.1?


