after clicking to 'hi' (hi enroute airways) map mode, the application became so busy trying to display that data that it didn't let me switch back to 'sat' or 'ter' mode at all, it resulted in permanent hang without letting me access to anything else

i used my phone to take a picture of this situation because it made half of my system to hang and remain P2ATC unresponsive ;) 

 

if the application is unable to properly display the content, then why that 'hi' feature button is even present? i recommend to disable and/or remove that button

Thanks for the report.

The problem is with the zoom level.  I've changed the code so you must zoom in further before the airways are painted.

In the meantime, just avoid using the Hi and Lo Map Modes or only use them when zoomed in close.

Dave