Many videos won't play

I have windows 10 64 bit, with all updates. I have dopus v11.18 x64. since I installed v11 i have had problems playing most videos with the embedded player. each time there has been an update more videos play but not all.

what i mean by this is

not all FLV, MP4 which is almost all of my videos.

but they will play when I try the build-in windows player or MPC-HC player or any other player. I would say about 20% of all these videos won't play.

all i get is a black screen and the progress bar does not progress.

Enable/fix playback of various media formats in Opus