Thanks for your feedback everyone!
@Martin, I'm sorry you had to lose that much data. I had a backup from September to go back to. I can still open my corrupted file and view things but the GEDCOM export didn't function properly when opened in another genealogy program.
I am giving up on Family Tree Maker. I have used it since 1998 or 1999. (I think it was Version 6 I started with.) Ever since they did that major format change in the 2008 version (I think), the program is slow, buggy, and now totally unreliable. I cannot trust my 14 years of hard work in it.