This describes the KPackage menus.
The items in the File menu are:
Brings up file selector for local and FTP files
A list of the most recently open package files
Search the installed package list for a package who's name contains the entered string
Produces a list of packages that contain the entered file name, selecting a line will display the information on that package. It behaves slightly differently for RPM (where you have to enter the exact file name) and DEB (where you can enter a regular expression).
Reread the package data and rebuild the package tree
Quit KPackage