The individual catalogs can be reconfigured by the user by running the [reconfig] support tag. This should be protected by one of the several forms of MiniVend authentication. preferably by HTTP basic authorization (see RemoteUser).
You can reconfigure from the command line (as the MiniVend user) with:
VENDROOT/bin/minivend -reconfig <catalog>
It is easy to manually reconfigure a catalog if you are the administrator.
MiniVend simply looks for a file etc/reconfig (based in the MiniVend software directory) at HouseKeeping time. If it
finds a script name that matches one of the catalogs, it will reconfigure
that catalog.