Your post disturbs me. I am running the now useless (thankyou Acom) FTM2006 with around 1,000 people. I have purchased FTM2014 but haven't had the courage to install it yet. I am running Windows 7 on my laptop, IE11, Chrome. My computer is about 3 yrs old. I don't have a tree on-line.
I WAS planning on biting the bullet and upgrading to FTM2014 this weekend but now I may rethink that. I'm nearly computer illiterate so if something goes wrong, I'll be stuck big-time.
Please keep us posted with your issue/issues. And, good luck; I hope you can resolve problems.