Downloaded the 0513 AIRAC cycle, and now PMDG747 won't work. I can start MSFS, but when I go to load the 747 there is a long pause, and then a message says: "Flight simulator 9, A Century of Flight has encountered a problem and has to close. sorry for any inconvenience???????????????" What have I done wrong? The reason I wanted to update the navigation database, is because i've found that more and more fixes are missing from charts that I have which are up to date. Oh dear, what have I done??????Martin Neep

I've not experienced this myself I'd either roll back to your latest Windows XP restore point or get an earlier version of the AIRAC and install that.Anyone else had this issue?

Uninstalled MSFS and PMDG 744. Re-installed them both and problem solved.