Mike,I cannot find the sql assistant download package under the teradata client tab. There are fload, mulitload and some other packages.
SQL Assistant is not available for download from the Developer Exchange.
You will need to download it from T@YS download page.
The product is listed there as 'SQLA' and the latest version is 14.10.0.x.
(But you can still download 14.01 or 13.11 versions also if you select 14/13.10 TTU version)