By default NT8 BootStrapper app is set to work with the new version of NinjaTrader Brokerage connections: Live and Sim. The connections menu is inspected to find the Live and SIM connections.
Tip: NinjaTrader connections menu will keep popping up as NT8 BootStrapper tries to resolve connections -configure Auto Mode off - and configure the connections to match Ninjatrader menu.
If the connections are not configured in NinjaTrader uncheck the connections you don't want to be monitored or connected via the app.
Configure Connections
Add in MC1 and MC2 connection names to match the connections in NinjaTrader - and set Auto Mode on checked for monitoring and connection dropout resolving.