Teradata Tools and Utilities Release 13.00.00 required that all products except for
the Teradata GSS Client package be uninstalled before installing the new
release. Since Teradata Tools and Utilities Release 13.10.00, all products in the release
except for the Teradata GSS Client package uninstall previous versions of
Teradata Tools and Utilities products. Optionally, existing versions of Teradata Tools and Utilities products can be manually uninstalled prior to installing Release 15.10. All
existing Teradata Tools and Utilities products, except for the Teradata GSS Client package can be uninstalled from an
option on the installation menu, and the Teradata GSS Client package and other individual products can be
uninstalled individually from the command line.