You know, if I was ever going to write a screenwriting program, I would make sure that the bloody thing didn't hiccup, randomly "lose authorisation," and stop working when an author was on deadline. And if it did suddenly decide it wasn't authorised, I'd at least have some way to fix it if it happened late at night, when the nice support people are home in bed and authors are on deadline.
Sorry. Just wanted to grumble. Final Draft isn't cheap. I really think it ought to work.