I am attempting to update to version 1.96 through impluse, but when I click on udpate it asks me that the prgram has to be uninstalled and that if I click 'OK' it will uninstall.  I click it at which point, it tells me I am missing one or more files and that I should be connected to the internet (which I am) before proceeding or try add/remove programs.

However only Gal Civ2 is there none of the expansions are present in the list.  I can't see where I can possibly download the installer again to repair the installation and short of going into program files and document and settings and deleting the folders manually (although this won't get rid of the registry values or other hidden folders), I don't know how to resolve this issue. 

The game runs fine, so I don't know what "file(s)" are missing.

Help is very much appreciated.

Jason