I'm sorry, but I had to delete lots of posts, because there were entirely DIFFERENT issues reported, that didn't had anything to do with this thread ( one was a question about customizing liveries...), and it made impossible to follow it.
The title of this thread is the latest Update is making the sim not to start. We'll discuss about this, and this only. Of course, I cannot reproduce it but, as usual, I'm always open to get into a Teamviewer session, to understand what might be different in your systems.
If you are affected, PLEASE contact me by email or Private Message, so we can arrange a remote assistance session to check for THIS and THIS problem only.
Many removed post here, were referring to an entirely different problem, which caused a GSX error log, which has been already discussed in another thread, with a solution, of course:
http://www.fsdreamteam.com/forum/index.php/topic,22447.msg151597.html#msg151597