Walter,
I went to fly the airplane today, and upon 740 boot-up, I got the same "esectional.exe" Error. I did update the software as you suggested since the the last error (3 weeks ago), but it's back. I can't verify which software revision is installed, as I can't get past the error. I do believe that if I re-install, it will go away though (hopefully!).
I had to use an ipad for navigation! And that's not my first choice.