The trial version has limitation that it cannot play HEVC file.
Ultra edition can play it as specification, however, if your GPU does not support the HEVC 10 bit hardware decoding, and you applied software (CPU) decoding to play a 4K, and HEVC 10 bit file, the performance will be terrible, obviously.
For reference, my Skylake iGPU laptop is apparently inferior than my KabyLake iGPU laptop when playing such file.
I can see the playback is relatively not smooth on the Skylake platform.
4K HEVC 8 bit or lower resolution does not require the hardware compatibility that much.
Cyberlink has refund guarantee if you purchase software on their offical web store.
You can check the compatibility after purcahse although the trial version cannot do it.