is my only option now to re-install the game? 
I honestly can not give that an Yes or a No answer.......
go to
www.ESET.com and use their online virus scanner to double check that you do not have a virus ( I am assuming you checked with your AVG antivirus software you already have installed )
their could be any number of things that could be the problem causing your PC to freeze up in the DA or freeze up in the EWA when selecting a plane......
it could be as simple as you have to many processes running in the back ground while you are playing Aces high, to something as bad as one of those "Root Kit Viruses" deeply inbedded into your OS or memory or whatever....
did you provide a DXDIAG report for Skuzzy or anyone to look at??? I don't call seeing one....... what you are thinking is a DA Bug as you titled this thread, could actually be a bloated Windows OS.......
is time to go back to square one with reporting the issue. and copy & paste a DXDIAG of your PC system
also go ahead and double check your anti-virus program by going to
www.ESET.com and using their free online scanner....