[PatK]

I can confirm the report brazen1 gave in post #3, although I can use an external player with the listed below, I lose the default, as others have noted, 'watched' flag is not set.

<player name="mpc-be64" type="ExternalPlayer" audio="false" video="true">
     <filename>C:\Program Files\MPC-BE x64\mpc-be64.exe</filename>
     <args>"{1}" /fullscreen /close</args>
     <hidexbmc>false</hidexbmc>
     <hideconsole>false</hideconsole>
     <warpcursor>none</warpcursor>
     <playcountminimumtime>1140</playcountminimumtime>
   </player>
 </players>