Clickonce - Database update

[letibal]

Hello,

I wrote a c# application that embedds a SQL 2005 database.

In http://msdn2.microsoft.com/en-us/library/d8saf4wy.aspx, it is
written that when updating an application using clickonce, I can access
the old database file in the .pre directory, which is supposed to be
subdirectory of the Data folder, in order to update my new database. My
problem : after multiple attempts, I was not able to see any .pre
directory and therefore could not access the old database.

Has anybody come across such a problem ? Is there any example/tutorial
describing this process ?

Thanks,

Tibo.