Hi and thanks for the answer. I am not rushing into the update. I can wait it is important that the apps are working.
Regarding plex CPU and other things It is working without subs because I have 4k tv and plex is doing pass through for the 4k movies. Only when subtitles are on then it starts to transcode and then my i3 Intel is not sufficient. I read that adding 4k graphic card will perform then hardware transcoding and offload from CPU. Now the question is do I have to do something special in order to use that graphic card in Xpenology like installing drivers, .... or it is plug and play.