I have the dvblink-viewer (dvblink_player) 6.0.0 for ubuntu.
It stoppend working since 1 week:
if I start dvblink_player, the TV guide is shown with the channels and EPG.
If I click on a live program, I get the description and if I click on the "play" icon, nothing happens, the TV guide is displayed again.
Android client and Kodi work, I have no problems there.