For me the MonstroMarkers, The Damage Log Indicators (received and damage dealt), the "Ship Movement Indicator" and the external app "MatchmakingMonitor" dont work.
Like you, I reinstalled the game in 0.6.10 [my problems started there] but still not working. So I think its more a general issue.
Maybe Aslain can comment, if these Mods and Apps are working for him.
Greetings
Blackbeard