No Video Playback

I downloaded Krypton on Windows 10 on my computer. I don’t get any video playback when trying to view tv shows or movies on any of the add-ons. When I had Kodi 14.1 on my computer everything worked fine…You display a message saying to download Krypton to watch add-ons more easily..if that’s the case why am I having this problem..If I can’t get a way to fix this I’m going back to Kodi 14.1..