[Instruments freeze and aircraft freezes]

Steps I did to do this were as follows:

 

Flight from KBFL to KDFW  cold and dark on the ramp,

after getting the APU started, started filling out the flight plan in the FMS. after that is all done, went to clear out a disco in the legs page, freezes at that, everytime I try to clear the disco

 

 

just tried again, when clearing the disco's or at least trying to, it freezes up the game.

[Instruments freeze and aircraft freezes]

Any work around for this? I cant seem to get a flight in at all without it freezing when putting in my flight plan on the FMS