Just upgraded to PC version 3.1.0; set up a flight EGTF to EDLA (Arnsberg/Menden), and tried to save it but the programme would pop up a crash error window (somewhere in the debug it says "flightplan name not valid").  Airport names without a "/" like in EDLA seem to be ok.  How to circumvent, as you can't even get to the window where you could rename the flightplan?
Strangely enough saving to cloud works.