No DTS anymore
After many installing and uninstalling and trying differnt type of codecs, MX Player restared (the first time, after different trys) after choosing the codec.
Now everything works fine. How I wrote, after some trys the first time, that MX Player restarted by itselfs.
Since the last update, there is no way to play DTS on my mobile. Trying to install current custom codec and the codec apk. No DTS.
Trying to restore old MX Version and old Player version and everything works fine.