Open PHT freezing in a Bizarre Way!

My Open PHT starts to freeze in a Bizarre Way.
It’s freeze, i can close, but I can’t kill process “OpenPlex.exe” via Task Manager or any other software.
And i can’t reopen because there is a stuck OpenPlex.exe in Task Manager that ai can’t ended, kill, or terminate.
And slow down Windows a lot. Only a few movies is having this problem. But is really annoying.
Only way to fix the problem is rebooting the PC and play the movie from the start. If a try to play where it’s freeze, freeze again and I have to Reboot AGAIN. I have to pray to not freeze during the movie again.

I try:
Uninstall - Reinstall
Update Codec, Driver Video, Media Server.
Use Antivirus, Anti Malware.
Downgrade Media Server
Try with Plex Home Theater.