Cubase Crashing When Exporting

I have the same problem: Cubase Crashing When Exporting to mp3
I am a new user for cubase AI 8, with UR12.
I updated all the driver and firmware and my system is window 10 home.
even purchaseed and downloaded the mp3 upgrade patch from the steinberg online shop.
STILL WITH NO SUCCESS.
Steinberg support is closed for July 4 weekend
and I have a deadline to meet.Please help!