Excel on iPad crashes on startup - recently upgraded to 9.0.2

I start Excel on the iPad and the splash screen startups, it attempts to update but then it crashes back to the home screen. I read that resetting the user login details it sometimes fixes this problem, in my case it does not :-(

I understand that deleting the app and reinstalling the app will delete the data, as I have a lot of files local to excel/iPad I am reluctant to do that.

Is there a fix or can I access the excel files another way ?

thanks

Mike.