Hier ein interessanter Beitrag zum Thema NAV 2009 von Microsoft :

In previous versions, all local client settings are stored in the .zup file. In Microsoft Dynamics NAV 2009, this is a bit more complex. This post tries to describe which settings are stored where.
In addition to that, with NAV 2009 you may be spending a lot of time looking for files with long folder-names. So this post also shows you the location of each file, to make it quicker to find them.

Setup files and tables in NAV 2009
In NAV 2009, settings are stored in various places. The following lists what is stored where. some settings are stored in files, and some in tables. I hope I have included everything here. But if the list should be incomplete, I would appreciate comments at the end of this post.

Client side:

PersonalizationStore.xml
stored in:
%AppData%\Microsoft\Microsoft Dynamics NAV\
This file stores some personal settings for the client like resizing of columns. It is probably the closest thing to the old zup file there is. The data in this file is primarily binary because it it not supposed to be updated manually. Even if you could edit the file (if you could find the settings you wanted to edit), then this is unsupported. But, like the old zup file, you can delete or rename it, and next time the client opens, it will create a new one.
ClientUserSettings.Config
Stored in:
%ProgramData%\Microsoft\Microsoft Dynamics NAV\
This file is where you can set RTC to connect to a specific service tier and/or a
....

Follow up:

Quelle: http://blogs.msdn.com/nav_developer/archive/2008/09/13/nav-2009-where-is-the-zup-file.aspx