After using AnyDVD HD I was able to play the m2ts files directly from MPC and PowerDVD 9 and grab screen captures. DVD Passkey Free didn't do the trick. Maybe I'll try DVDPasskey for BD because it is a little bit less expensive than AnyDVD HD, but now I know the trick.
Samsung UN78HU9000GXZD / Marantz SR8012 / B&W 705 S2 + HTM71 S2 Front + B&W DB4S sub + Polk Audio Monitor 30 Back
LG OLED 65C8PSA / Marantz SR6013 / B&W CM1 S2 + CM Center S2 Front + Jamo J10 sub + NHT SuperZeros 2.1 Back
LG OLED 55EA9850 / Yamaha Soundbar YSP 2700