UpdateInstaller is the class that handles applying TDI fixes. It is not
intended that instances of this class be instantiated, but rather that this
class' main function be executed. The UpdateInstaller uses a zip file which
represents a TDI fix along with a TDI installation's .registry file to
install maintenance. The applyUpdates.bat/sh scripts in the product's bin
directory are the accepted ways of running the update installer.
The update installer can be run to update, rollback, show information about a
fix, or to show information about the current TDI installation.