Having trouble after donloading the new 5.7.1.1 from 5.5.0.7

After starting program I get this box

AeroFly 5 main executable has stopped working

program shuts down.

5.5.0.7 is activated and all planes are working. I have to uninstall AF 5 reload and update to 5.5.0.7 and have done this 4 times using diffewrent downloads
Any ideas what to do?:
Thanks